diff --git a/.trellis/spec/hyb-oa/reimbursement-invoice-ocr.md b/.trellis/spec/hyb-oa/reimbursement-invoice-ocr.md
index 700db36a..aea266d1 100644
--- a/.trellis/spec/hyb-oa/reimbursement-invoice-ocr.md
+++ b/.trellis/spec/hyb-oa/reimbursement-invoice-ocr.md
@@ -30,6 +30,10 @@ duplicate detection or attachment behavior.
   require the same own-or-`expense.view_all` guard as reimbursement detail reads
   before invoking the precheck service; an ordinary nonparticipant must receive
   403 without service-side evaluation.
+- 取消或放宽必填校验时，必须继续审计该校验之后的代码是否依赖它提供的
+  非空、类型或状态保证，并为生产真实存在的空值路径补回归测试。不得只
+  删除前置错误分支；可空字段的 `.trim()`、`.length`、字符串拼接和传给
+  非空参数的调用都应逐处确认。
 
 ## Scenario: OCR Disabled Without Mock Data
 
@@ -996,8 +1000,10 @@ await selectApprovalRule(reimbursement.total_amount);
 - Only `travel_meal` and `travel_local_transport_allowance` are invoice-free in
   the initial policy. Invoice-free means skip invoice presence/amount checks;
   it does not remove explanation, formula, approval or attachment obligations.
-- Every `assets` item requires a trimmed approval basis on create, update and
-  submit. Switching an item to a non-assets type clears the stored basis.
+- 公司当前没有 assets 事前审批制度。Item create/update 继续兼容可空的
+  `assetPriorApprovalBasis`：创建时缺失或空白落 null；更新时 omitted 保留
+  现值，显式 null/空白清空；切换到非 assets 类型仍清空。当前 PC/移动 UI
+  不展示或发送该字段，历史值不得因普通编辑被静默清空。
 - `office_supplies` at or above CNY 2,000 per item shows the same non-blocking
   office-electronics hint on editable PC/mobile forms and read-only finance
   detail. It does not change the type or decide accounting fixed-asset status.
@@ -1027,9 +1033,9 @@ await selectApprovalRule(reimbursement.total_amount);
 
 ### 4. Validation & Error Matrix
 
-- Assets item without basis -> `400 VALID_001` with
-  `assetPriorApprovalBasis=required_for_assets`; submit returns affected item
-  IDs under `asset_prior_approval_basis_required`.
+- Assets item without basis -> 允许创建、编辑和提交；字段缺失、数据库现值
+  为 null 或显式清空均不得产生空值解引用或 `500`，其他金额和票据门禁照常
+  执行。
 - Guard-on bind without `linkedItemId` -> `400 VALID_001` with
   `required_when_invoice_guard_enabled`; an item outside the form remains
   `item_not_in_reimbursement` with zero writes.
@@ -1052,9 +1058,12 @@ await selectApprovalRule(reimbursement.total_amount);
   guard either on or off.
 - Base: guard off preserves an older draft and its auto-created link; later
   disabling the guard preserves links created during a guarded rollout.
+- Good: assets 编辑请求 omitted 兼容字段时，数据库 null 保持 null、历史非空值
+  原样保留；显式 null/空白才清空。
 - Bad: compare every positive item to a zero invoice total, silently create an
   item while explicit selection is required, use JavaScript floating-point
-  sums for money, or let repeated init erase finance account mappings.
+  sums for money, let repeated init erase finance account mappings, or 删除前置
+  必填校验后继续对可空值直接调用 `.trim()`。
 
 ### 6. Tests Required
 
@@ -1064,13 +1073,15 @@ await selectApprovalRule(reimbursement.total_amount);
 - Expense-type route tests assert list mapping, create/update persistence and
   audit changes for `requiresInvoice`; seed tests assert the two allowances,
   disabled legacy types, default-off flag and account-code preservation.
-- Item/submit route tests cover assets create/update/submit, invoice-free zero
-  invoice, missing link, unlinked bound invoice, declared-over-invoice and
-  participant/nonparticipant side effects.
+- Item/submit route tests 覆盖 assets 创建 omitted→null、编辑 null+omitted→null、
+  有值+omitted→保留、显式清空、切换非 assets 清空和无依据提交，并继续覆盖
+  invoice-free zero invoice、missing link、unlinked bound invoice、
+  declared-over-invoice 与 participant/nonparticipant side effects。
 - Bind tests cover flag on/off, missing/foreign/successful explicit links and
   prove the guard-on path does not create a reimbursement item.
-- PC/mobile Playwright covers descriptions, approval-basis input, the CNY 2,000
-  warning, allowance-only submit projection, disabled add action until every
+- PC/mobile Playwright covers asset 登记导向说明、批准依据输入/展示均不存在且
+  保存 payload omission、CNY 2,000 warning、allowance-only submit projection、
+  disabled add action until every
   selected invoice has an item, and pending-OCR binding retaining that item.
 - Run full backend Vitest with the pinned BIFF8 Python dependencies, Prisma
   validate/generate check, frontend typecheck/build, focused Playwright,
@@ -1090,6 +1101,11 @@ if (item.amount > linkedInvoices.reduce((sum, invoice) => sum + Number(invoice.t
 update: { account_code_default: null }; // erases finance configuration on init
 ```
 
+```js
+// 旧必填校验删除后，omitted/null 会在这里变成 500。
+asset_prior_approval_basis: targetApprovalBasis.trim();
+```
+
 #### Correct
 
 ```js
@@ -1107,6 +1123,10 @@ update: { name, description, requires_invoice }; // preserve account_code_defaul
 create: { name, description, requires_invoice, account_code_default: null };
 ```
 
+```js
+asset_prior_approval_basis: targetApprovalBasis?.trim() || null;
+```
+
 ## Scenario: Payment Batch Receipt Attention Count
 
 ### 1. Scope / Trigger
diff --git a/.trellis/tasks/08-30-reimbursement-assets-prior-approval-correction/check.jsonl b/.trellis/tasks/08-30-reimbursement-assets-prior-approval-correction/check.jsonl
new file mode 100644
index 00000000..9dd3234a
--- /dev/null
+++ b/.trellis/tasks/08-30-reimbursement-assets-prior-approval-correction/check.jsonl
@@ -0,0 +1 @@
+{"_example": "Fill with {\"file\": \"<path>\", \"reason\": \"<why>\"}. Put spec/research files only — no code paths. Run `python3 .trellis/scripts/get_context.py --mode packages` to list available specs. Delete this line once real entries are added."}
diff --git a/.trellis/tasks/08-30-reimbursement-assets-prior-approval-correction/design.md b/.trellis/tasks/08-30-reimbursement-assets-prior-approval-correction/design.md
new file mode 100644
index 00000000..4a3b3074
--- /dev/null
+++ b/.trellis/tasks/08-30-reimbursement-assets-prior-approval-correction/design.md
@@ -0,0 +1,58 @@
+# 设计：取消报销资产事前批准强制
+
+## 设计边界
+
+本轮是对 B1 产品口径的最小纠偏，不新增 schema、feature flag 或审批机制。生产继续运行 `0f9f403`，新候选只改变 assets 明细的保存/提交条件、前端呈现、seed description 与事实源。
+
+## 服务端兼容合同
+
+`asset_prior_approval_basis` 保持 nullable，API 的 `assetPriorApprovalBasis?: string | null` 保持兼容：
+
+| 场景 | 目标行为 |
+| --- | --- |
+| 新建 assets，字段缺失/空白 | 保存 null，允许创建 |
+| 编辑 assets，字段 omitted、现值为 null | 保持 null，允许编辑，不发生 null `.trim()` |
+| 编辑 assets，字段 omitted、现值有值 | 保留现有值，避免隐藏 UI 后静默清空 |
+| 编辑 assets，字段显式 null/空白 | 清空为 null |
+| assets 切换为非 assets | 清空为 null |
+| 提交 assets 且字段为空 | 不阻断，继续执行金额、票据和 workflow 门禁 |
+
+创建/编辑仍查询费用类型以验证 enabled/category；category 只用于切换到非 assets 时清理兼容字段，不再决定必填。
+
+删除创建/编辑必填分支时，原本被校验守卫保护的 `.trim()` 必须同时改为安全归一化：
+
+```js
+body.assetPriorApprovalBasis?.trim() || null
+targetApprovalBasis?.trim() || null
+```
+
+不允许用非空断言或默认虚构文本代替 null 兼容。
+
+## 前端数据流
+
+- PC `ReimbursementItemEditor` 的表单模型移除 `assetPriorApprovalBasis`，不渲染输入、不参与 disabled、不进入 `onSave`。
+- PC 详情保存 payload 不再写该字段，编辑初始值也不再从详情 DTO 映射。
+- 移动端 `ItemFormState`、新增/编辑初始化和 mutation payload 同步移除该字段。
+- PC 表格与移动卡片移除批准依据展示。API DTO 类型保留，避免对旧服务端/客户端契约做无收益破坏。
+
+## 主数据说明
+
+seed 继续通过 upsert 更新启用类型 description，不触碰 `account_code_default`。推荐文案：
+
+- 设备采购：`通用设备采购；请在明细说明中写明物品名称、实际使用人或责任人、存放位置，便于资产登记。`
+- 家具采购：`办公家具采购；请在明细说明中写明物品名称、实际使用人或责任人、存放位置，便于资产登记。`
+- 办公电子设备：`单条明细金额达到 2,000 元的办公电子设备通常选择本类型；请在明细说明中写明物品名称、实际使用人或责任人、存放位置，便于资产登记。该门槛不等同于会计固定资产确认标准。`
+
+## 发布与回滚
+
+- 无 migration；init 仍可运行既有 migration status + seed 流程，必须确认 pending=none、seed 退出码 0。
+- 部署后核对三个 description、B2 仍为 global on、`/ready` 和 bundle marker 为新候选。
+- 公网用合成 assets 草稿验证 PC/移动保存和提交，不使用 0017 做 smoke。
+- 异常时回滚应用到本轮发布前候选 `0f9f403`；数据库兼容列和已存在值不需要补偿。回滚后旧候选会恢复强制，因此 0017 在纠偏验收完成前始终不得退回。
+
+## 风险控制
+
+- 最大兼容风险是隐藏输入后编辑请求携带 null，误清历史值；通过前端 payload 断言和服务端 omitted-field 测试锁定。
+- 最大运行时风险是删除必填校验后暴露下游 `.trim()` 的 null/undefined 假设；创建 omitted、编辑 null omitted 和编辑有值 omitted 三条路由测试必须同时覆盖。
+- 最大文案风险是四处 2,000 元提示只改一半；E2E 同时覆盖 PC/移动编辑态和展示态。
+- seed 失败会造成代码已取消强制但费用类型仍宣称要批准；部署验收必须同时核应用行为和三条主数据文案。
diff --git a/.trellis/tasks/08-30-reimbursement-assets-prior-approval-correction/implement.jsonl b/.trellis/tasks/08-30-reimbursement-assets-prior-approval-correction/implement.jsonl
new file mode 100644
index 00000000..9dd3234a
--- /dev/null
+++ b/.trellis/tasks/08-30-reimbursement-assets-prior-approval-correction/implement.jsonl
@@ -0,0 +1 @@
+{"_example": "Fill with {\"file\": \"<path>\", \"reason\": \"<why>\"}. Put spec/research files only — no code paths. Run `python3 .trellis/scripts/get_context.py --mode packages` to list available specs. Delete this line once real entries are added."}
diff --git a/.trellis/tasks/08-30-reimbursement-assets-prior-approval-correction/implement.md b/.trellis/tasks/08-30-reimbursement-assets-prior-approval-correction/implement.md
new file mode 100644
index 00000000..20afea69
--- /dev/null
+++ b/.trellis/tasks/08-30-reimbursement-assets-prior-approval-correction/implement.md
@@ -0,0 +1,46 @@
+# 实施清单：取消报销资产事前批准强制
+
+## 1. 规划与候选边界
+
+- [x] PRD、design、implement 经用户审查并明确批准实施。
+- [x] 确认当前生产仍运行 `0f9f403`，0017 尚未退回；0016 可由真实财务并行推进，不把真人单据用于本轮 smoke。
+
+## 2. 服务端纠偏
+
+- [x] 删除明细创建、编辑和提交三处 assets 批准依据强制错误。
+- [x] 同步修复被原校验遮蔽的两处空值解引用：create 使用 `body.assetPriorApprovalBasis?.trim() || null`，patch 使用 `targetApprovalBasis?.trim() || null`。
+- [x] 规范创建/编辑字段语义：create omitted/空白落 null；patch 现值为 null 且 omitted 保持 null、有值且 omitted 保留、显式空清除、切换非 assets 清除。
+- [x] 保留 Prisma 列、请求 schema、详情响应和 API 兼容字段，不新增 migration。
+
+## 3. PC 与移动端纠偏
+
+- [x] PC editor 移除输入、状态、初始值、保存 payload 和 disabled 条件；详情表格移除展示。
+- [x] 移动端移除 ItemFormState 字段、新建/编辑映射、保存 payload、输入、disabled 条件和卡片展示。
+- [x] 四处 2,000 元提示统一删除“并填写事前批准依据”，保留原触发函数和提示级语义。
+
+## 4. 主数据、文档与规约
+
+- [x] 更新三个启用 assets seed description 为资产登记导向，确认 update/create 分支均落地且不写 account code。
+- [x] 更新 `docs/产品口径.md` 和 reimbursement spec，删除不存在的强制审批制度与错误矩阵。
+- [x] 在 reimbursement spec 记录：取消必填校验时必须检查下游依赖的非空/类型/状态假设，并覆盖真实空值路径，不能只删除前置校验。
+- [x] 不修改既有 migration；migration 单测继续验证 nullable 与无破坏性操作。
+
+## 5. 测试
+
+- [x] 后端路由测试覆盖 assets 无依据可提交，以及创建 omitted→null、patch null+omitted→null、patch 有值+omitted→保留、显式清空、切换非 assets 清空；全部不得出现 500，B2 门禁不回退。
+- [x] seed 测试断言三个 description 不含批准措辞且包含资产登记信息。
+- [x] r111 E2E 覆盖 PC/移动无输入、无展示、可保存和四处新提示；明确关联与免票合同继续通过。
+- [x] 运行 `cd server && npm run prisma:validate` 和聚焦 Vitest。
+- [x] 运行 `cd client && npm run typecheck && npm run build` 及聚焦 Playwright。
+- [x] 运行 Trellis governance、process contract、docs registry、敏感信息检查和 `git diff --check`。
+
+## 6. 复核、提交与部署门禁
+
+- [x] 实施后执行只读专项 review，重点核权限/提交门禁未误删、API 兼容和 seed 文案一致性。
+- [ ] 用户审查通过后，以中文 commit 引用 task 名，push 与部署分别取得授权。
+- [ ] 无 migration 部署仍显式记录 pre/post pending=none、init/seed 退出码 0、三条 description、B2 global on、`/ready` 和 bundle marker。
+- [ ] 公网合成 assets 草稿 PC/移动验证通过并清理后，才由真实财务按已批准理由退回 0017。
+
+## 7. 回滚
+
+- [ ] 应用或 seed 验收失败时停止 0017，回滚应用到 `0f9f403`；不回滚数据库列、不清历史值、不改 B2 关联数据。
diff --git a/.trellis/tasks/08-30-reimbursement-assets-prior-approval-correction/prd.md b/.trellis/tasks/08-30-reimbursement-assets-prior-approval-correction/prd.md
new file mode 100644
index 00000000..6e0746f5
--- /dev/null
+++ b/.trellis/tasks/08-30-reimbursement-assets-prior-approval-correction/prd.md
@@ -0,0 +1,81 @@
+# 取消报销资产事前批准强制
+
+## Goal
+
+纠正 B1 把不存在的公司制度做成系统强制的问题：公司当前不要求办公家具、通用设备或办公电子设备采购事前审批，报销系统不得要求员工填写“事前批准依据”才能保存或提交。保留已上线的兼容字段与历史数据，不做 migration；把 assets 类型的员工说明改为资产登记导向，要求在明细说明中写清物品、使用人或责任人、存放位置。
+
+## Background and Confirmed Facts
+
+- 当前生产候选 `0f9f403` 已上线 B1/B2。B1 在 PC、移动端和服务端把所有 `category=assets` 明细一律要求填写事前批准依据，但公司没有对应的事前审批制度。
+- 继续保留必填或教员工填写固定话术都会制造虚假合规痕迹；改成大额门槛仍然是在实现一条不存在的规则，因此本轮直接取消强制，不设置金额触发条件。
+- `ReimbursementItem.asset_prior_approval_basis` 已是可空列；生产现有明细没有已填写值，但仍按兼容原则保留列、API 字段和任何历史值，不删除、不回填、不迁移。
+- `BX-20260828-0016` 是外部技术服务费用，不含 assets 明细，可在本任务并行规划/实施期间由真实财务作为真人 canary 退回。`BX-20260828-0017` 的实物是办公家具，必须等待本纠偏上线后再退回。
+
+## Scope
+
+- 报销 assets 明细创建、编辑、提交的批准依据校验。
+- PC/移动端 assets 明细编辑、保存和展示，以及办公用品 2,000 元选类提示。
+- 三个启用 assets 费用类型的 seed description。
+- 产品口径、报销规约、聚焦后端与端到端测试，以及无 migration 的受控部署验收。
+
+## Requirements
+
+### R1 取消所有 assets 批准依据阻断
+
+- 服务端删除三个强制点：明细创建 `server/src/routes/reimbursements.js:3670`、明细编辑 `:3835`、提交时 `missingAssetApprovalItemIds` 检查 `:4061-4077`。
+- assets 明细未提供 `assetPriorApprovalBasis` 时允许创建、编辑和提交；票据—明细关联、票面金额、正金额、费用类型启用状态及其他既有门禁保持不变。
+- 创建 assets 明细时，批准依据缺失或空白保存为 null。编辑时字段未传必须保留历史值，显式传 null/空白才清空；切换为非 assets 类型继续清空该字段。不得因页面隐藏字段而在编辑日期、金额、类型或说明时静默丢失历史值。
+- 删除必填校验后必须同步消除其下游的非空假设：创建路径 `server/src/routes/reimbursements.js:3686-3687` 使用 `body.assetPriorApprovalBasis?.trim() || null`；编辑路径 `:3854-3856` 使用 `targetApprovalBasis?.trim() || null`。字段 omitted、数据库现值为 null 或显式 null 均不得触发 `.trim()` TypeError/500。
+
+### R2 移除无用途的前端输入与展示
+
+- PC `ReimbursementItemEditor.tsx` 和移动端 `MobileReimbursementDetailPage.tsx` 不再渲染“事前批准依据”输入框，也不再因其为空禁用保存按钮。
+- PC `ReimbursementDetailPage.tsx` 和移动端明细卡不再展示“事前批准依据”行。API 类型与详情响应字段保留以兼容旧客户端和历史数据，但当前 UI 不再发送该字段。
+- 清理 PC/移动端编辑状态、初始值和保存 payload 中只为该输入框服务的数据流，确保普通编辑不显式发送 null 清空历史值。
+
+### R3 把资产类型说明改为资产登记导向
+
+- `assets_equipment`、`assets_furniture`、`assets_office_electronics` 三个启用类型不再出现“事前批准”“批准人”“批准时间”或“批准依据”。
+- 类型说明要求员工在明细“说明”中写清物品名称、实际使用人或责任人、存放位置，供管理员后续人工建卡和资产登记使用。
+- `assets_office_electronics` 保留单条明细 `2,000 元`选类提示以及“不等同于会计固定资产确认标准”的声明。
+
+### R4 统一 2,000 元提示文案
+
+- 以下四处提示统一为“该金额通常应选择办公电子设备。”，删除“并填写事前批准依据”：PC 编辑态 `ReimbursementItemEditor.tsx:188`、PC 展示态 `ReimbursementDetailPage.tsx:1282`、移动编辑态 `MobileReimbursementDetailPage.tsx:1112`、移动展示态 `MobileReimbursementDetailPage.tsx:1143`。
+- 提示仍只在 `office_supplies` 且单条明细金额大于等于 `2,000 元`时显示，保持提示级、不阻断、不自动改类。
+
+### R5 文档、规约与测试同步
+
+- 更新 `docs/产品口径.md:194`，明确公司当前无 assets 事前审批要求，资产信息通过明细说明支持人工登记。
+- 更新 `.trellis/spec/hyb-oa/reimbursement-invoice-ocr.md:984/988/1031/1032`，删除强制批准合同和对应错误矩阵，保留 nullable/API 兼容与非 assets 清理语义。
+- 反转 `server/tests/unit/routes/reimbursements.expense-standards.test.js:337-348` 的断言：缺批准依据的 assets 明细不得再返回 400，并补创建/编辑兼容测试。至少覆盖：创建 assets 且字段 omitted 返回成功并落库 null；编辑数据库现值为 null 的 assets 且字段 omitted 返回成功并保持 null；编辑有历史值的 assets 且字段 omitted 保留原值；显式 null/空白清空；切换非 assets 清空。
+- `server/tests/unit/scripts/reimbursement-expense-policy-migration.test.js:17` 继续证明列为 nullable 且 migration 无破坏性操作；本轮不得新建或修改生产 migration。
+- 更新 `client/tests/e2e/r111-invoice-reimbursement-guard.spec.ts:747-804`：PC/移动端不显示批准输入或展示，保存不被阻断，四处 2,000 元提示使用新文案；票据明确关联和免票补助合同继续通过。
+- 在 reimbursement spec 沉淀通用防回归规则：取消或放宽必填校验时，必须审计后续代码是否依赖该校验提供的非空、类型或状态保证，并为真实空值路径补回归测试；不得只删除前置错误分支。
+
+## Acceptance Criteria
+
+- [x] PC 和移动端选择三个 assets 类型时均不出现“事前批准依据”输入框，未填写该字段也能保存明细并提交。
+- [x] 服务端创建、编辑、提交均不再返回 `required_for_assets` 或 `asset_prior_approval_basis_required`，其他 B2 票据门禁不回退。
+- [x] 创建 assets 字段 omitted、编辑 assets 现值为 null 且字段 omitted 均成功并保持 null，不出现 TypeError/500；有值 omitted、显式清空和切换非 assets 的兼容语义均有测试锁定。
+- [x] 当前 UI 编辑 assets 明细不会发送该兼容字段；服务端遗漏字段保留历史值，显式清空有效，切换非 assets 仍清空。
+- [x] PC/移动编辑态和展示态四处 2,000 元提示一致，仍为提示级且不自动改类型。
+- [x] 三个启用 assets 类型 description 均转为资产登记导向；办公电子设备仍保留 2,000 元及非会计固定资产门槛声明。
+- [x] 数据库列、Prisma schema、API 字段及历史数据保留，无 migration、无批量更新、无数据清理。
+- [x] 聚焦后端测试、前端 typecheck/build、r111 E2E、Trellis/process/docs 治理和 `git diff --check` 全部通过。
+- [ ] 新候选完成独立只读复核、push、无 migration 部署和公网 PC/移动验证后，才允许真实财务退回 0017。
+
+## Out of Scope
+
+- 新增采购申请、审批流、金额批准门槛、数量/单价模型或自动资产建卡。
+- 改造票据直接重关联、明细删除联动、B3 财务一页式或恢复行内费用标准提示。
+- 修复 `deploy-existing.sh --no-deps`、PGDATA 容器内检查、admin smoke 治理等运维债。
+- 清空 `asset_prior_approval_basis` 历史值、删除数据库列或修改既有 migration。
+- 代替真实财务退回、审批或付款；0016 canary 和 0017 退回继续按生产写入门禁单独执行。
+
+## Test Plan
+
+- 服务端：Prisma validate；聚焦 reimbursement expense-standards、创建/编辑路由、seed defaults 与既有 migration 测试，确认无批准依据可通过且 B2 金额/关联门禁不回退。
+- 前端：typecheck、build、r111 聚焦 Playwright；同时覆盖 PC/移动编辑态和展示态的字段消失、保存可用与新提示文案。
+- 数据与部署：确认无新增 migration、pre/post pending=none、init/seed exit 0、三个 description 正确、B2 仍 global on、合成 assets 草稿通过且 0017 未被当作 smoke。
+- 治理：task validate、Trellis governance、process contract、docs registry、敏感信息扫描和 `git diff --check`。
diff --git a/.trellis/tasks/08-30-reimbursement-assets-prior-approval-correction/task.json b/.trellis/tasks/08-30-reimbursement-assets-prior-approval-correction/task.json
new file mode 100644
index 00000000..24c7c185
--- /dev/null
+++ b/.trellis/tasks/08-30-reimbursement-assets-prior-approval-correction/task.json
@@ -0,0 +1,26 @@
+{
+  "id": "reimbursement-assets-prior-approval-correction",
+  "name": "reimbursement-assets-prior-approval-correction",
+  "title": "取消报销资产事前批准强制",
+  "description": "纠正不存在的 assets 事前审批制度：取消报销明细强制批准依据，隐藏无用途 UI，保留兼容字段与历史数据，并把资产类型说明改为登记导向。",
+  "status": "in_progress",
+  "dev_type": null,
+  "scope": "assets reimbursement validation; PC/mobile item editing; expense-type seed descriptions; reimbursement product/spec contracts",
+  "package": null,
+  "priority": "P0",
+  "creator": "shunli",
+  "assignee": "shunli",
+  "createdAt": "2026-08-30",
+  "completedAt": null,
+  "branch": null,
+  "base_branch": "main",
+  "worktree_path": null,
+  "commit": null,
+  "pr_url": null,
+  "subtasks": [],
+  "children": [],
+  "parent": "08-29-reimbursement-expense-policy-invoice-guard",
+  "relatedFiles": [],
+  "notes": "生产 0f9f403 已上线 B1/B2；0016 非 assets 可并行作为真人 canary，0017 为家具采购，必须等待本纠偏上线后再退回。无 migration、无 flag 或生产账号写入。",
+  "meta": {}
+}
\ No newline at end of file
diff --git a/client/src/pages/MobileReimbursementDetailPage.tsx b/client/src/pages/MobileReimbursementDetailPage.tsx
index 1e473b22..3ba5ce9b 100644
--- a/client/src/pages/MobileReimbursementDetailPage.tsx
+++ b/client/src/pages/MobileReimbursementDetailPage.tsx
@@ -89,7 +89,6 @@ type ItemFormState = {
   expenseDate: string;
   amount: string;
   description: string;
-  assetPriorApprovalBasis: string;
 };
 
 type SelectedInvoiceMap = Record<string, string>;
@@ -331,7 +330,6 @@ export function MobileReimbursementDetailPage() {
       expenseDate: detail?.reimbursementDate ?? todayDate(),
       amount: "",
       description: "",
-      assetPriorApprovalBasis: "",
     });
     setItemError("");
   };
@@ -344,7 +342,6 @@ export function MobileReimbursementDetailPage() {
       expenseDate: item.expenseDate ?? detail?.reimbursementDate ?? todayDate(),
       amount: item.amount,
       description: item.description ?? "",
-      assetPriorApprovalBasis: item.assetPriorApprovalBasis ?? "",
     });
     setItemError("");
   };
@@ -360,7 +357,6 @@ export function MobileReimbursementDetailPage() {
         expenseDate: form.expenseDate,
         amount: form.amount,
         description: form.description.trim() || undefined,
-        assetPriorApprovalBasis: form.assetPriorApprovalBasis.trim() || null,
       };
 
       if (form.mode === "edit" && form.itemId) {
@@ -1093,29 +1089,17 @@ export function MobileReimbursementDetailPage() {
                   onChange={(event) => setItemForm((current) => current ? { ...current, description: event.target.value } : current)}
                 />
               </label>
-              {expenseTypes.find((type) => type.id === itemForm.expenseTypeId)?.category === "assets" ? (
-                <label className="col-span-2 block space-y-1 text-sm text-zinc-700">
-                  <span>事前批准依据</span>
-                  <Textarea
-                    disabled={itemSaveMutation.isPending}
-                    placeholder="填写批准人、批准时间和简短依据"
-                    rows={2}
-                    value={itemForm.assetPriorApprovalBasis}
-                    onChange={(event) => setItemForm((current) => current ? { ...current, assetPriorApprovalBasis: event.target.value } : current)}
-                  />
-                </label>
-              ) : null}
               {shouldShowOfficeElectronicsHint(
                 expenseTypes.find((type) => type.id === itemForm.expenseTypeId)?.code,
                 itemForm.amount,
               ) ? (
-                <p className="col-span-2 text-xs text-amber-600">该金额通常应选择办公电子设备并填写事前批准依据。</p>
+                <p className="col-span-2 text-xs text-amber-600">该金额通常应选择办公电子设备。</p>
               ) : null}
             </div>
             <div className="mobile-two-action-grid">
               <Button
                 type="button"
-                disabled={!itemForm.expenseTypeId || !itemForm.expenseDate || !Number.isFinite(Number(itemForm.amount)) || Number(itemForm.amount) <= 0 || (expenseTypes.find((type) => type.id === itemForm.expenseTypeId)?.category === "assets" && !itemForm.assetPriorApprovalBasis.trim()) || itemSaveMutation.isPending}
+                disabled={!itemForm.expenseTypeId || !itemForm.expenseDate || !Number.isFinite(Number(itemForm.amount)) || Number(itemForm.amount) <= 0 || itemSaveMutation.isPending}
                 onClick={() => itemSaveMutation.mutate(itemForm)}
               >
                 {itemSaveMutation.isPending ? "保存中..." : "保存"}
@@ -1140,10 +1124,7 @@ export function MobileReimbursementDetailPage() {
                 </div>
                 {item.description ? <p className="mt-2 text-sm leading-5 text-zinc-600">{item.description}</p> : null}
                 {shouldShowOfficeElectronicsHint(item.expenseType?.code, item.amount) ? (
-                  <p className="mt-2 text-xs text-amber-600">该金额通常应选择办公电子设备并填写事前批准依据。</p>
-                ) : null}
-                {item.assetPriorApprovalBasis ? (
-                  <p className="mt-2 text-xs text-zinc-500">事前批准依据：{item.assetPriorApprovalBasis}</p>
+                  <p className="mt-2 text-xs text-amber-600">该金额通常应选择办公电子设备。</p>
                 ) : null}
                 {canMaintainReimbursement ? (
                   <div className="mobile-two-action-grid mt-3">
diff --git a/client/src/pages/ReimbursementDetailPage.tsx b/client/src/pages/ReimbursementDetailPage.tsx
index 161b1b90..7cb0d001 100644
--- a/client/src/pages/ReimbursementDetailPage.tsx
+++ b/client/src/pages/ReimbursementDetailPage.tsx
@@ -136,7 +136,6 @@ export function ReimbursementDetailPage() {
     expenseDate: "",
     amount: "",
     description: "",
-    assetPriorApprovalBasis: "",
   });
   const currentDetailSource = buildPcDetailSource(location.pathname, location.search);
   const navigationState = location.state as PcDetailNavigationState | null;
@@ -291,7 +290,6 @@ export function ReimbursementDetailPage() {
         expenseDate: data.expenseDate,
         amount: data.amount,
         description: data.description.trim() || undefined,
-        assetPriorApprovalBasis: data.assetPriorApprovalBasis.trim() || null,
       };
 
       if (itemEditor.mode === "create") {
@@ -814,7 +812,6 @@ export function ReimbursementDetailPage() {
       expenseTypeId: defaultExpenseTypeId,
       amount: item?.amount ?? "",
       description: item?.description ?? "",
-      assetPriorApprovalBasis: item?.assetPriorApprovalBasis ?? "",
     };
   };
 
@@ -1279,12 +1276,7 @@ export function ReimbursementDetailPage() {
                       <div>{item.description ?? "-"}</div>
                       {shouldShowOfficeElectronicsHint(item.expenseType?.code, item.amount) ? (
                         <div className="mt-1 text-xs text-amber-600">
-                          该金额通常应选择办公电子设备并填写事前批准依据。
-                        </div>
-                      ) : null}
-                      {item.assetPriorApprovalBasis ? (
-                        <div className="mt-1 text-xs text-zinc-500">
-                          事前批准依据：{item.assetPriorApprovalBasis}
+                          该金额通常应选择办公电子设备。
                         </div>
                       ) : null}
                       {precheckStandardChecks
diff --git a/client/src/pages/reimbursement-detail/ReimbursementItemEditor.tsx b/client/src/pages/reimbursement-detail/ReimbursementItemEditor.tsx
index 0fa4c0f2..ecef7db7 100644
--- a/client/src/pages/reimbursement-detail/ReimbursementItemEditor.tsx
+++ b/client/src/pages/reimbursement-detail/ReimbursementItemEditor.tsx
@@ -22,7 +22,6 @@ export type ItemEditorInitialValues = {
   expenseDate: string;
   amount: string;
   description: string;
-  assetPriorApprovalBasis: string;
 };
 
 export type ItemEditorSaveData = {
@@ -30,7 +29,6 @@ export type ItemEditorSaveData = {
   expenseDate: string;
   amount: string;
   description: string;
-  assetPriorApprovalBasis: string;
 };
 
 export interface ReimbursementItemEditorProps {
@@ -60,7 +58,6 @@ export function ReimbursementItemEditor({
   const [expenseDate, setExpenseDate] = useState(initialValues.expenseDate);
   const [amount, setAmount] = useState(initialValues.amount);
   const [description, setDescription] = useState(initialValues.description);
-  const [assetPriorApprovalBasis, setAssetPriorApprovalBasis] = useState(initialValues.assetPriorApprovalBasis);
 
   // Reset internal state when initialValues change (e.g. switching between create/edit)
   useEffect(() => {
@@ -68,11 +65,9 @@ export function ReimbursementItemEditor({
     setExpenseDate(initialValues.expenseDate);
     setAmount(initialValues.amount);
     setDescription(initialValues.description);
-    setAssetPriorApprovalBasis(initialValues.assetPriorApprovalBasis);
-  }, [initialValues.expenseTypeId, initialValues.expenseDate, initialValues.amount, initialValues.description, initialValues.assetPriorApprovalBasis]);
+  }, [initialValues.expenseTypeId, initialValues.expenseDate, initialValues.amount, initialValues.description]);
 
   const selectedExpenseType = expenseTypes.find((item) => item.id === expenseTypeId) ?? null;
-  const isAssetExpense = selectedExpenseType?.category === "assets";
   const numericAmount = Number(amount || 0);
   const shouldWarnOfficeEquipment =
     shouldShowOfficeElectronicsHint(selectedExpenseType?.code, numericAmount);
@@ -102,7 +97,7 @@ export function ReimbursementItemEditor({
   const hasPositiveAmount = Number.isFinite(numericAmount) && numericAmount > 0;
 
   const handleSave = () => {
-    onSave({ expenseTypeId, expenseDate, amount, description, assetPriorApprovalBasis });
+    onSave({ expenseTypeId, expenseDate, amount, description });
   };
 
   return (
@@ -185,28 +180,11 @@ export function ReimbursementItemEditor({
           ) : null}
           {shouldWarnOfficeEquipment ? (
             <p className="text-xs text-amber-600">
-              该金额通常应选择办公电子设备并填写事前批准依据。
+              该金额通常应选择办公电子设备。
             </p>
           ) : null}
         </div>
 
-        {isAssetExpense ? (
-          <div className="space-y-1 md:col-span-4">
-            <label className="text-xs text-zinc-600" htmlFor="assetPriorApprovalBasis">
-              事前批准依据
-            </label>
-            <Textarea
-              data-testid="reimbursement-item-asset-approval-basis"
-              disabled={isPending}
-              id="assetPriorApprovalBasis"
-              onChange={(event) => setAssetPriorApprovalBasis(event.target.value)}
-              placeholder="填写批准人、批准时间和简短依据"
-              rows={2}
-              value={assetPriorApprovalBasis}
-            />
-          </div>
-        ) : null}
-
         <div className="space-y-1 md:col-span-4">
           <label className="text-xs text-zinc-600" htmlFor="itemDescription">
             说明
@@ -230,8 +208,7 @@ export function ReimbursementItemEditor({
             !expenseTypeId ||
             !expenseDate ||
             !amount.trim() ||
-            !hasPositiveAmount ||
-            (isAssetExpense && !assetPriorApprovalBasis.trim())
+            !hasPositiveAmount
           }
           onClick={handleSave}
           type="button"
diff --git a/client/tests/e2e/r111-invoice-reimbursement-guard.spec.ts b/client/tests/e2e/r111-invoice-reimbursement-guard.spec.ts
index 14cd43ef..c0ac8f0d 100644
--- a/client/tests/e2e/r111-invoice-reimbursement-guard.spec.ts
+++ b/client/tests/e2e/r111-invoice-reimbursement-guard.spec.ts
@@ -83,7 +83,7 @@ function buildExpenseTypes() {
         code: "assets_office_electronics",
         name: "办公电子设备",
         category: "assets",
-        description: "2,000 元及以上通常选本类型，不等同于会计固定资产标准。",
+        description: "单条明细金额达到 2,000 元的办公电子设备通常选择本类型；请在明细说明中写明物品名称、实际使用人或责任人、存放位置，便于资产登记。该门槛不等同于会计固定资产确认标准。",
         requiresInvoice: true,
         enabled: true,
       },
@@ -186,6 +186,7 @@ function buildReimbursementState() {
     failedInvoices: [buildFailedInvoice()],
     statusPollCount: 0,
     bindRequests: [] as Array<{ reimbursementId?: string; linkedItemId?: string }>,
+    itemSaveRequests: [] as Array<Record<string, unknown>>,
     submitRequestCount: 0,
     invoiceGuardEnabled: false,
     detailItems: null as null | Array<Record<string, unknown>>,
@@ -384,6 +385,26 @@ async function mockApis(page: Page, state: ReturnType<typeof buildReimbursementS
       return;
     }
 
+    if (
+      (pathName === `/api/reimbursements/${reimbursementId}/items` && request.method() === "POST")
+      || (pathName.startsWith(`/api/reimbursements/${reimbursementId}/items/`) && request.method() === "PATCH")
+    ) {
+      const payload = request.postDataJSON() as Record<string, unknown>;
+      state.itemSaveRequests.push(payload);
+      await fulfillJson(route, {
+        item: {
+          id: "asset-item-r111",
+          expenseTypeId: payload.expenseTypeId ?? "expense-type-assets-r111",
+          expenseDate: payload.expenseDate ?? "2026-05-08",
+          amount: payload.amount ?? "2000.00",
+          description: payload.description ?? null,
+          assetPriorApprovalBasis: null,
+        },
+        totalAmount: "2000.00",
+      });
+      return;
+    }
+
     if (pathName === `/api/reimbursements/${reimbursementId}/precheck`) {
       await fulfillJson(route, {
         decision: "pass",
@@ -735,7 +756,7 @@ test.describe("R111 国内报销发票与附件双端体验", () => {
     await page.screenshot({ path: screenshotPath("pc-reimbursement-detail.png"), fullPage: true });
   });
 
-  test("B1/B2 在 PC 和移动端显示设备提示并要求明确关联明细", async ({ page }) => {
+  test("B1/B2 在 PC 和移动端取消批准依据并保持设备提示与明确关联", async ({ page }) => {
     const state = buildReimbursementState();
     state.invoiceGuardEnabled = true;
     state.detailItems = [{
@@ -758,11 +779,18 @@ test.describe("R111 国内报销发票与附件双端体验", () => {
     await login(page);
     await page.goto(`/reimbursements/${reimbursementId}`);
 
-    await expect(page.getByText("该金额通常应选择办公电子设备并填写事前批准依据。")).toBeVisible();
+    await expect(page.getByText("该金额通常应选择办公电子设备。")).toBeVisible();
     await page.getByTestId("reimbursement-item-add").click();
+    await page.locator("#expenseTypeId").selectOption("expense-type-office-supplies-r111");
+    await page.getByTestId("reimbursement-item-amount").fill("2000.00");
+    await expect(page.getByText("该金额通常应选择办公电子设备。")).toHaveCount(2);
     await page.locator("#expenseTypeId").selectOption("expense-type-assets-r111");
-    await expect(page.getByTestId("reimbursement-item-asset-approval-basis")).toBeVisible();
-    await expect(page.getByText("2,000 元及以上通常选本类型，不等同于会计固定资产标准。")).toBeVisible();
+    await expect(page.getByTestId("reimbursement-item-asset-approval-basis")).toHaveCount(0);
+    await expect(page.getByText(/请在明细说明中写明物品名称、实际使用人或责任人、存放位置/)).toBeVisible();
+    await page.getByTestId("reimbursement-item-description").fill("合成设备，测试员工使用，测试位置");
+    await page.getByTestId("reimbursement-item-save").click();
+    await expect.poll(() => state.itemSaveRequests.length).toBe(1);
+    expect(state.itemSaveRequests[0]).not.toHaveProperty("assetPriorApprovalBasis");
 
     await page.getByTestId("reimbursement-invoice-add").click();
     const invoiceDialog = page.getByTestId("reimbursement-invoice-dialog");
@@ -788,10 +816,17 @@ test.describe("R111 国内报销发票与附件双端体验", () => {
     await page.keyboard.press("Escape");
     await page.setViewportSize({ width: 390, height: 844 });
     await page.goto(`/mobile/reimbursements/${reimbursementId}`);
-    await expect(page.getByText("该金额通常应选择办公电子设备并填写事前批准依据。")).toBeVisible();
+    await expect(page.getByText("该金额通常应选择办公电子设备。")).toBeVisible();
     await page.getByRole("button", { name: "新增", exact: true }).click();
+    await page.getByLabel("费用类型").selectOption("expense-type-office-supplies-r111");
+    await page.getByRole("textbox", { name: "金额", exact: true }).fill("2000.00");
+    await expect(page.getByText("该金额通常应选择办公电子设备。")).toHaveCount(2);
     await page.getByLabel("费用类型").selectOption("expense-type-assets-r111");
-    await expect(page.getByText("事前批准依据", { exact: true })).toBeVisible();
+    await expect(page.getByText("事前批准依据", { exact: true })).toHaveCount(0);
+    await page.getByRole("textbox", { name: "说明", exact: true }).fill("合成设备，测试员工使用，测试位置");
+    await page.getByRole("button", { name: "保存", exact: true }).click();
+    await expect.poll(() => state.itemSaveRequests.length).toBe(2);
+    expect(state.itemSaveRequests[1]).not.toHaveProperty("assetPriorApprovalBasis");
 
     state.invoiceGuardEnabled = false;
     state.invoices = [];
diff --git a/docs/产品口径.md b/docs/产品口径.md
index 214bf1b2..38e05a8c 100644
--- a/docs/产品口径.md
+++ b/docs/产品口径.md
@@ -191,6 +191,6 @@
 ### R-7 报销费用类型与票据门禁
 - “客户招待”统一为“业务招待费”；“培训会议”停止新选并拆为“会议费”“培训费”；“IT 硬件”停止新选，低值配件使用“办公用品”，需登记的选择“办公电子设备”。停用类型保留历史，不迁移旧明细语义。
 - 办公用品与办公电子设备按单条明细金额 `2,000 元`作选类提示；该金额不等同于会计固定资产确认标准。达到金额仍选择办公用品时只提示员工和财务复核，不自动改类或阻断提交。
-- assets 个人报销属于经事前批准的例外；明细必须填写批准人、批准时间和简短依据。当前不强制关联采购申请，也不自动建资产卡。
+- 公司当前不要求 assets 类个人报销事前审批；员工应在明细说明中写清物品名称、实际使用人或责任人、存放位置，供管理员后续人工登记。当前不强制关联采购申请，也不自动建资产卡。
 - 伙食补助费和市内交通补助费不要求发票；其他首期启用费用类型默认需要有效票据。免票不等于免除补助算式、业务说明、审批或必要附件。
 - 票据—明细强关联和票面金额提交门禁使用独立双闸逐步启用。开启时每张有效发票必须明确选择明细，仅对需票明细校验缺票及申报金额高于票面合计；关闭只回退门禁，不删除已建立的关联数据。
diff --git a/server/src/routes/reimbursements.js b/server/src/routes/reimbursements.js
index 23843eef..ce9a958f 100644
--- a/server/src/routes/reimbursements.js
+++ b/server/src/routes/reimbursements.js
@@ -3667,15 +3667,6 @@ async function reimbursementRoutes(fastify) {
             details: { expenseTypeId: "invalid_or_disabled" },
           });
         }
-        if (expenseType.category === "assets" && !body.assetPriorApprovalBasis?.trim()) {
-          throw new AppError({
-            code: "VALID_001",
-            message: "参数校验失败",
-            statusCode: 400,
-            details: { assetPriorApprovalBasis: "required_for_assets" },
-          });
-        }
-
         const created = await tx.reimbursementItem.create({
           data: {
             reimbursement_id: reimbursementId,
@@ -3684,7 +3675,7 @@ async function reimbursementRoutes(fastify) {
             amount: body.amount,
             description: body.description,
             asset_prior_approval_basis:
-              expenseType.category === "assets" ? body.assetPriorApprovalBasis.trim() : null,
+              expenseType.category === "assets" ? body.assetPriorApprovalBasis?.trim() || null : null,
             created_by: request.employee.id,
             updated_by: request.employee.id,
           },
@@ -3827,15 +3818,6 @@ async function reimbursementRoutes(fastify) {
           parsedBody.data.assetPriorApprovalBasis === undefined
             ? item.asset_prior_approval_basis
             : parsedBody.data.assetPriorApprovalBasis;
-        if (expenseType.category === "assets" && !(targetApprovalBasis ?? "").trim()) {
-          throw new AppError({
-            code: "VALID_001",
-            message: "参数校验失败",
-            statusCode: 400,
-            details: { assetPriorApprovalBasis: "required_for_assets" },
-          });
-        }
-
         const updated = await tx.reimbursementItem.update({
           where: { id: parsedItemId.data },
           data: {
@@ -3853,7 +3835,7 @@ async function reimbursementRoutes(fastify) {
               : {}),
             asset_prior_approval_basis:
               expenseType.category === "assets"
-                ? targetApprovalBasis.trim()
+                ? targetApprovalBasis?.trim() || null
                 : null,
             updated_by: request.employee.id,
           },
@@ -4029,7 +4011,6 @@ async function reimbursementRoutes(fastify) {
           select: {
             id: true,
             amount: true,
-            asset_prior_approval_basis: true,
             expense_type: {
               select: { code: true, category: true, requires_invoice: true },
             },
@@ -4058,25 +4039,6 @@ async function reimbursementRoutes(fastify) {
             details: { items: "positive_amount_required", itemIds: invalidAmountItems },
           });
         }
-        const missingAssetApprovalItemIds = reimbursementItems
-          .filter(
-            (item) =>
-              item.expense_type.category === "assets" &&
-              !item.asset_prior_approval_basis?.trim(),
-          )
-          .map((item) => item.id);
-        if (missingAssetApprovalItemIds.length) {
-          throw new AppError({
-            code: "VALID_001",
-            message: "参数校验失败",
-            statusCode: 400,
-            details: {
-              items: "asset_prior_approval_basis_required",
-              itemIds: missingAssetApprovalItemIds,
-            },
-          });
-        }
-
         const invoiceGuardGate = await evaluateFeatureFlag({
           prisma: tx,
           config: fastify.config,
diff --git a/server/src/scripts/seed-config.js b/server/src/scripts/seed-config.js
index 6710052c..1aeb9cd1 100644
--- a/server/src/scripts/seed-config.js
+++ b/server/src/scripts/seed-config.js
@@ -47,13 +47,13 @@ const ENABLED_EXPENSE_TYPES = [
   { code: "business_marketing", name: "营销投放", category: "business", description: "经批准的营销推广或广告投放费用；请上传正式票据并说明渠道和期间。" },
   { code: "business_meeting", name: "会议费", category: "business", description: "经批准举办或参加会议发生的费用；请上传正式票据并说明会议事项。" },
   { code: "business_training_fee", name: "培训费", category: "business", description: "经批准参加或组织培训发生的费用；请上传正式票据并说明培训事项。" },
-  { code: "assets_equipment", name: "设备采购", category: "assets", description: "经事前批准由个人垫付的通用设备采购；请填写批准人、批准时间和可核验依据。" },
-  { code: "assets_furniture", name: "家具采购", category: "assets", description: "经事前批准由个人垫付的办公家具采购；请填写批准人、批准时间和可核验依据。" },
+  { code: "assets_equipment", name: "设备采购", category: "assets", description: "通用设备采购；请在明细说明中写明物品名称、实际使用人或责任人、存放位置，便于资产登记。" },
+  { code: "assets_furniture", name: "家具采购", category: "assets", description: "办公家具采购；请在明细说明中写明物品名称、实际使用人或责任人、存放位置，便于资产登记。" },
   {
     code: "assets_office_electronics",
     name: "办公电子设备",
     category: "assets",
-    description: "单条明细金额达到 2,000 元的办公电子设备通常选择本类型，并填写事前批准依据。该门槛不等同于会计固定资产确认标准。",
+    description: "单条明细金额达到 2,000 元的办公电子设备通常选择本类型；请在明细说明中写明物品名称、实际使用人或责任人、存放位置，便于资产登记。该门槛不等同于会计固定资产确认标准。",
   },
   { code: "utilities", name: "水电费", category: "other", description: "办公或生产经营相关的水电费用；请上传正式票据并说明费用期间。" },
   { code: "rent", name: "房租租赁费", category: "other", description: "经批准的场地、设备或其他租赁费用；请上传正式票据并说明租赁事项和期间。" },
diff --git a/server/tests/unit/routes/reimbursements.detail.test.js b/server/tests/unit/routes/reimbursements.detail.test.js
index baa2a3ed..1d08db9c 100644
--- a/server/tests/unit/routes/reimbursements.detail.test.js
+++ b/server/tests/unit/routes/reimbursements.detail.test.js
@@ -175,20 +175,49 @@ async function buildApp({
   ],
   paymentBatchItem = null,
   paymentActors = [],
+  itemRecord = {
+    id: "77777777-7777-4777-8777-777777777777",
+    expense_type_id: "88888888-8888-4888-8888-888888888888",
+    asset_prior_approval_basis: null,
+  },
+  expenseType = {
+    id: "88888888-8888-4888-8888-888888888888",
+    enabled: true,
+    category: "assets",
+  },
 } = {}) {
   const app = Fastify();
   const tx = {
     $queryRaw: vi.fn(async () => [reimbursement]),
     reimbursementForm: {
-      update: vi.fn(),
+      update: vi.fn(async () => ({ id: REIMBURSEMENT_ID })),
       delete: vi.fn(),
     },
+    expenseType: {
+      findUnique: vi.fn(async () => expenseType),
+    },
     invoicePool: {
       updateMany: vi.fn(),
     },
     reimbursementItem: {
-      create: vi.fn(),
-      update: vi.fn(),
+      findFirst: vi.fn(async () => itemRecord),
+      aggregate: vi.fn(async () => ({ _sum: { amount: "10.00" } })),
+      create: vi.fn(async ({ data }) => ({
+        id: itemRecord.id,
+        expense_type_id: data.expense_type_id,
+        expense_date: data.expense_date,
+        amount: data.amount,
+        description: data.description ?? null,
+        asset_prior_approval_basis: data.asset_prior_approval_basis,
+      })),
+      update: vi.fn(async ({ data }) => ({
+        id: itemRecord.id,
+        expense_type_id: data.expense_type_id ?? itemRecord.expense_type_id,
+        expense_date: data.expense_date ?? new Date("2026-04-10T00:00:00.000Z"),
+        amount: data.amount ?? "10.00",
+        description: data.description ?? "合成明细",
+        asset_prior_approval_basis: data.asset_prior_approval_basis,
+      })),
       deleteMany: vi.fn(),
     },
     auditLog: {
@@ -1020,3 +1049,139 @@ describe("reimbursement maintenance authorization", () => {
     await app.close();
   });
 });
+
+describe("reimbursement asset item nullable approval-basis compatibility", () => {
+  const itemId = "77777777-7777-4777-8777-777777777777";
+  const assetExpenseTypeId = "88888888-8888-4888-8888-888888888888";
+  const officeExpenseTypeId = "99999999-9999-4999-8999-999999999999";
+
+  it("creates an assets item with an omitted basis and persists null", async () => {
+    const { app, tx } = await buildApp({
+      permissionCodes: ["expense.edit_own"],
+      reimbursement: buildReimbursementRecord({ status: "draft" }),
+    });
+
+    const response = await app.inject({
+      method: "POST",
+      url: `/api/reimbursements/${REIMBURSEMENT_ID}/items`,
+      headers: { authorization: "Bearer test" },
+      payload: {
+        expenseTypeId: assetExpenseTypeId,
+        expenseDate: "2026-04-10",
+        amount: "10.00",
+        description: "合成设备",
+      },
+    });
+
+    expect(response.statusCode, response.body).toBe(200);
+    expect(tx.reimbursementItem.create).toHaveBeenCalledWith(expect.objectContaining({
+      data: expect.objectContaining({ asset_prior_approval_basis: null }),
+    }));
+    expect(response.json().data.item.assetPriorApprovalBasis).toBeNull();
+    await app.close();
+  });
+
+  it("edits an assets item whose stored basis is null while omitted and keeps null", async () => {
+    const { app, tx } = await buildApp({
+      permissionCodes: ["expense.edit_own"],
+      reimbursement: buildReimbursementRecord({ status: "draft" }),
+      itemRecord: {
+        id: itemId,
+        expense_type_id: assetExpenseTypeId,
+        asset_prior_approval_basis: null,
+      },
+    });
+
+    const response = await app.inject({
+      method: "PATCH",
+      url: `/api/reimbursements/${REIMBURSEMENT_ID}/items/${itemId}`,
+      headers: { authorization: "Bearer test" },
+      payload: { amount: "20.00" },
+    });
+
+    expect(response.statusCode, response.body).toBe(200);
+    expect(tx.reimbursementItem.update).toHaveBeenCalledWith(expect.objectContaining({
+      data: expect.objectContaining({ asset_prior_approval_basis: null }),
+    }));
+    await app.close();
+  });
+
+  it("preserves an existing assets basis when the field is omitted", async () => {
+    const { app, tx } = await buildApp({
+      permissionCodes: ["expense.edit_own"],
+      reimbursement: buildReimbursementRecord({ status: "draft" }),
+      itemRecord: {
+        id: itemId,
+        expense_type_id: assetExpenseTypeId,
+        asset_prior_approval_basis: "历史依据",
+      },
+    });
+
+    const response = await app.inject({
+      method: "PATCH",
+      url: `/api/reimbursements/${REIMBURSEMENT_ID}/items/${itemId}`,
+      headers: { authorization: "Bearer test" },
+      payload: { amount: "20.00" },
+    });
+
+    expect(response.statusCode, response.body).toBe(200);
+    expect(tx.reimbursementItem.update).toHaveBeenCalledWith(expect.objectContaining({
+      data: expect.objectContaining({ asset_prior_approval_basis: "历史依据" }),
+    }));
+    await app.close();
+  });
+
+  it.each([null, "   "])("clears an assets basis when explicitly sent as %j", async (assetPriorApprovalBasis) => {
+    const { app, tx } = await buildApp({
+      permissionCodes: ["expense.edit_own"],
+      reimbursement: buildReimbursementRecord({ status: "draft" }),
+      itemRecord: {
+        id: itemId,
+        expense_type_id: assetExpenseTypeId,
+        asset_prior_approval_basis: "历史依据",
+      },
+    });
+
+    const response = await app.inject({
+      method: "PATCH",
+      url: `/api/reimbursements/${REIMBURSEMENT_ID}/items/${itemId}`,
+      headers: { authorization: "Bearer test" },
+      payload: { assetPriorApprovalBasis },
+    });
+
+    expect(response.statusCode, response.body).toBe(200);
+    expect(tx.reimbursementItem.update).toHaveBeenCalledWith(expect.objectContaining({
+      data: expect.objectContaining({ asset_prior_approval_basis: null }),
+    }));
+    await app.close();
+  });
+
+  it("clears an existing basis when switching to a non-assets type", async () => {
+    const { app, tx } = await buildApp({
+      permissionCodes: ["expense.edit_own"],
+      reimbursement: buildReimbursementRecord({ status: "draft" }),
+      itemRecord: {
+        id: itemId,
+        expense_type_id: assetExpenseTypeId,
+        asset_prior_approval_basis: "历史依据",
+      },
+      expenseType: { id: officeExpenseTypeId, enabled: true, category: "office" },
+    });
+
+    const response = await app.inject({
+      method: "PATCH",
+      url: `/api/reimbursements/${REIMBURSEMENT_ID}/items/${itemId}`,
+      headers: { authorization: "Bearer test" },
+      payload: { expenseTypeId: officeExpenseTypeId },
+    });
+
+    expect(response.statusCode, response.body).toBe(200);
+    expect(tx.reimbursementItem.update).toHaveBeenCalledWith(expect.objectContaining({
+      data: expect.objectContaining({
+        expense_type_id: officeExpenseTypeId,
+        asset_prior_approval_basis: null,
+      }),
+    }));
+    await app.close();
+  });
+});
diff --git a/server/tests/unit/routes/reimbursements.expense-standards.test.js b/server/tests/unit/routes/reimbursements.expense-standards.test.js
index 23b5e50d..4d869f73 100644
--- a/server/tests/unit/routes/reimbursements.expense-standards.test.js
+++ b/server/tests/unit/routes/reimbursements.expense-standards.test.js
@@ -329,7 +329,8 @@ describe("reimbursements routes expense standard integration", () => {
     await app.close();
   });
 
-  it("requires prior approval basis for assets items", async () => {
+  it("allows assets items without an approval basis and continues submission", async () => {
+    resolveEntityPrecheckMock.mockResolvedValue(buildPrecheck());
     const { app, tx } = await buildApp({
       reimbursementItems: [{
         id: "asset-item",
@@ -340,12 +341,8 @@ describe("reimbursements routes expense standard integration", () => {
 
     const response = await app.inject({ method: "POST", url: `/api/reimbursements/${REIMBURSEMENT_ID}/submit` });
 
-    expect(response.statusCode).toBe(400);
-    expect(response.json().error.details).toEqual({
-      items: "asset_prior_approval_basis_required",
-      itemIds: ["asset-item"],
-    });
-    expect(tx.workflowInstance.create).not.toHaveBeenCalled();
+    expect(response.statusCode, response.body).toBe(200);
+    expect(tx.workflowInstance.create).toHaveBeenCalledTimes(1);
     await app.close();
   });
 
diff --git a/server/tests/unit/scripts/seed-config.defaults.test.js b/server/tests/unit/scripts/seed-config.defaults.test.js
index 6a782d78..11c01336 100644
--- a/server/tests/unit/scripts/seed-config.defaults.test.js
+++ b/server/tests/unit/scripts/seed-config.defaults.test.js
@@ -69,6 +69,23 @@ describe("reimbursement expense policy defaults", () => {
     }
   });
 
+  it("uses asset-registration guidance without inventing a prior-approval policy", () => {
+    const assetTypes = ENABLED_EXPENSE_TYPES.filter((item) => item.category === "assets");
+    expect(assetTypes.map((item) => item.code)).toEqual([
+      "assets_equipment",
+      "assets_furniture",
+      "assets_office_electronics",
+    ]);
+    for (const expenseType of assetTypes) {
+      expect(expenseType.description).toContain("物品名称");
+      expect(expenseType.description).toContain("实际使用人或责任人");
+      expect(expenseType.description).toContain("存放位置");
+      expect(expenseType.description).not.toMatch(/事前批准|批准人|批准时间|批准依据/);
+    }
+    expect(assetTypes.find((item) => item.code === "assets_office_electronics")?.description)
+      .toContain("不等同于会计固定资产确认标准");
+  });
+
   it("seeds the invoice guard disabled by default", () => {
     expect(DEFAULT_FEATURE_FLAGS).toContainEqual({
       flag_key: "reimbursement_invoice_guard_v1",