diff --git a/apps/backend/src/services/platforms/ninetyone/order-service.js b/apps/backend/src/services/platforms/ninetyone/order-service.ts
similarity index 98%
rename from apps/backend/src/services/platforms/ninetyone/order-service.js
rename to apps/backend/src/services/platforms/ninetyone/order-service.ts
index 9a9124c1..797fa4d8 100644
--- a/apps/backend/src/services/platforms/ninetyone/order-service.js
+++ b/apps/backend/src/services/platforms/ninetyone/order-service.ts
@@ -1,5 +1,3 @@
-// @ts-check
-
 import { query } from '../../../db/client.js'
 import { createOrder, findOrderByPlatformOrderId, getOrderById, updateOrder } from '../../../repositories/order-repo.js'
 import { listOrderItemsByOrderId, replaceOrderItems } from '../../../repositories/order-item-repo.js'
@@ -17,7 +15,9 @@ import { nowIso } from '../../../utils/time.js'
 export const OPEN_91_PENDING_CONFIG_STATUS = 'pending_config'
 export const OPEN_91_MANUAL_FAILED_STATUS = 'manual_failed'
 
-export function buildOpen91SourceEvent(payload = {}, config = {}) {
+type JsonObject = Record<string, any>
+
+export function buildOpen91SourceEvent(payload: JsonObject = {}, config: JsonObject = {}) {
   const normalized = normalizeOpen91CreatePayload(payload)
   const productNo = normalized.productNo
 
@@ -195,8 +195,7 @@ export async function listOpen91Orders({ page = 1, pageSize = 20, status = 'pend
     'o.provider = $1',
     'o.platform = $2',
   ]
-  /** @type {Array<string | number>} */
-  const params = [OPEN_91_PROVIDER, OPEN_91_PLATFORM]
+  const params: Array<string | number> = [OPEN_91_PROVIDER, OPEN_91_PLATFORM]
 
   if (normalizedStatus && normalizedStatus !== 'all') {
     params.push(normalizedStatus)
diff --git a/docs/backend-typescript-migration-plan.md b/docs/backend-typescript-migration-plan.md
index 97a8c366..cde9f089 100644
--- a/docs/backend-typescript-migration-plan.md
+++ b/docs/backend-typescript-migration-plan.md
@@ -562,6 +562,14 @@
     - `npm run typecheck`
     - `npm run build`
     - `npm test` 共 139 个用例通过
+129. 91卡券平台订单服务迁移到 `.ts`：
+    - `src/services/platforms/ninetyone/order-service.ts`
+130. 91 卡券 source event 构造、待补配置订单落库、后台重试 / 手动失败、后台订单列表映射已进入 TS 编译链路；动态 payload / config 与 SQL 参数数组补齐类型
+131. Docker 内验证通过：
+    - `src/services/platforms/ninetyone/order-service.test.js`、`src/services/open-91/shared.test.js` 共 7 个用例通过
+    - `npm run typecheck`
+    - `npm run build`
+    - `npm test` 共 139 个用例通过
 
 ## 下一步建议