diff --git a/apps/backend/src/services/open-91/order-query-service.ts b/apps/backend/src/services/open-91/order-query-service.ts
index 7368f0de..758d9407 100644
--- a/apps/backend/src/services/open-91/order-query-service.ts
+++ b/apps/backend/src/services/open-91/order-query-service.ts
@@ -85,7 +85,7 @@ export async function queryOpen91Order(payload: JsonObject = {}, { requestId = '
 
   for (const task of tasks) {
     let claimUrl = ''
-    let expireTime = String(task.primary_claim_expires_at || task.claim_expires_at || '').trim()
+    let expireTime: unknown = task.primary_claim_expires_at || task.claim_expires_at || ''
     const primaryToken = String(task.primary_claim_token || task.claim_token || '').trim()
 
     if (primaryToken) {
@@ -94,7 +94,7 @@ export async function queryOpen91Order(payload: JsonObject = {}, { requestId = '
       try {
         const ensured = await ensureTaskClaimLink(task)
         claimUrl = String(ensured.claimUrl || '').trim()
-        expireTime = String(ensured.expiredAt || expireTime).trim()
+        expireTime = ensured.expiredAt || expireTime
       } catch {
         claimUrl = ''
       }