diff --git a/video-gen-api/app/cmd/migrate_user_credits.py b/video-gen-api/app/cmd/migrate_user_credits.py
index a436a78a..1a512560 100644
--- a/video-gen-api/app/cmd/migrate_user_credits.py
+++ b/video-gen-api/app/cmd/migrate_user_credits.py
@@ -61,7 +61,7 @@ async def amain(argv: list[str]) -> int:
                                 description="历史用户积分迁移",
                                 source_type=CreditBalanceSourceType.LEGACY_MIGRATION.value,
                                 valid_from=migration_time,
-                                expires_at=add_natural_months(migration_time, 1),
+                                expires_at=add_natural_months(migration_time, 12),
                                 credit_level=CreditLevel.GENERAL.value,
                                 source_id=user_id,
                                 related_id=user_id,
diff --git a/video-gen-api/app/services/payment.py b/video-gen-api/app/services/payment.py
index c75eb6b4..f9aeadb8 100644
--- a/video-gen-api/app/services/payment.py
+++ b/video-gen-api/app/services/payment.py
@@ -625,9 +625,33 @@ async def _close_wechat_order(db: AsyncSession, order: PaymentOrder, db_configs:
         if code == 204:
             logger.info(f"WeChat order closed: order_no={order.order_no}")
             return True
-        else:
-            logger.error(f"WeChat close failed: order_no={order.order_no}, code={code}, result={result}")
-            return False
+
+        data = _parse_wechat_result(result)
+        error_code = str(
+            data.get("code")
+            or data.get("err_code")
+            or data.get("error_code")
+            or ""
+        ).upper()
+        raw_result = str(result).upper()
+
+        # 微信明确返回“订单不存在”时，同样视为没有远端订单需要继续关闭。
+        # 只兼容明确的订单不存在错误，不吞掉签名、网络、系统等其他异常。
+        if error_code in {"ORDER_NOT_EXIST", "ORDERNOTEXIST"} or (
+            code == 404
+            and ("ORDER_NOT_EXIST" in raw_result or "ORDERNOTEXIST" in raw_result)
+        ):
+            logger.info(
+                f"WeChat order not exist, treat as closed for local expiry: "
+                f"order_no={order.order_no}, code={code}, error_code={error_code or 'unknown'}"
+            )
+            return True
+
+        logger.error(
+            f"WeChat close failed: order_no={order.order_no}, "
+            f"code={code}, result={result}"
+        )
+        return False
     except Exception as e:
         logger.exception(f"WeChat close exception: order_no={order.order_no}")
         return False
@@ -885,13 +909,24 @@ async def _close_alipay_order(db: AsyncSession, order: PaymentOrder, db_configs:
         if response.is_success():
             logger.info(f"Alipay order closed: order_no={order.order_no}")
             return True
-        else:
-            logger.error(
-                f"Alipay close failed: code={response.code}, "
-                f"msg={response.msg}, sub_code={response.sub_code}, "
-                f"sub_msg={response.sub_msg}, order_no={order.order_no}"
+
+        # 支付宝明确返回“交易不存在”时，远端没有可继续关闭的交易。
+        # 对本地已经达到超时时间的 pending 订单，可视为关单目标已经满足，
+        # 避免 Celery 每分钟对同一订单无限重复调用 trade.close。
+        if str(response.sub_code or "").upper() == "ACQ.TRADE_NOT_EXIST":
+            logger.info(
+                f"Alipay trade not exist, treat as closed for local expiry: "
+                f"order_no={order.order_no}, code={response.code}, "
+                f"sub_code={response.sub_code}"
             )
-            return False
+            return True
+
+        logger.error(
+            f"Alipay close failed: code={response.code}, "
+            f"msg={response.msg}, sub_code={response.sub_code}, "
+            f"sub_msg={response.sub_msg}, order_no={order.order_no}"
+        )
+        return False
 
     except Exception as e:
         if "TypeError" in str(e) and ("bytes" in str(e) or "str" in str(e)):