diff --git a/server/MiAssessment/src/MiAssessment.Core/Services/WechatPayService.cs b/server/MiAssessment/src/MiAssessment.Core/Services/WechatPayService.cs
index 05b5263..c677086 100644
--- a/server/MiAssessment/src/MiAssessment.Core/Services/WechatPayService.cs
+++ b/server/MiAssessment/src/MiAssessment.Core/Services/WechatPayService.cs
@@ -815,7 +815,7 @@ public class WechatPayService : IWechatPayService
             var redisKey = $"{FAILED_SHIPPING_KEY_PREFIX}{request.OrderNo}";
             var json = JsonSerializer.Serialize(failedOrder);
 
-            await _redisService.SetAsync(redisKey, json, FAILED_SHIPPING_EXPIRY);
+            await _redisService.SetStringAsync(redisKey, json, FAILED_SHIPPING_EXPIRY);
 
             _logger.LogInformation("已保存发货失败订单到重试队列: OrderNo={OrderNo}, ErrCode={ErrCode}, ErrMsg={ErrMsg}",
                 request.OrderNo, errCode, errMsg);