diff --git a/aspnet-core/services/LY.MicroService.Applications.Single/GlobalUsings.cs b/aspnet-core/services/LY.MicroService.Applications.Single/GlobalUsings.cs
index ce2c8f83a..0cd27c195 100644
--- a/aspnet-core/services/LY.MicroService.Applications.Single/GlobalUsings.cs
+++ b/aspnet-core/services/LY.MicroService.Applications.Single/GlobalUsings.cs
@@ -122,7 +122,6 @@ global using LINGYUN.Platform.Localization;
 global using LINGYUN.Platform.Settings.VueVbenAdmin;
 global using LINGYUN.Platform.Theme.VueVbenAdmin;
 global using LY.MicroService.Applications.Single.Authentication;
-global using LY.MicroService.Applications.Single.EntityFrameworkCore;
 global using LY.MicroService.Applications.Single.IdentityResources;
 global using Medallion.Threading;
 global using Medallion.Threading.Redis;
diff --git a/aspnet-core/services/LY.MicroService.Applications.Single/MicroServiceApplicationsSingleModule.Configure.cs b/aspnet-core/services/LY.MicroService.Applications.Single/MicroServiceApplicationsSingleModule.Configure.cs
index 033625438..bdf159ff1 100644
--- a/aspnet-core/services/LY.MicroService.Applications.Single/MicroServiceApplicationsSingleModule.Configure.cs
+++ b/aspnet-core/services/LY.MicroService.Applications.Single/MicroServiceApplicationsSingleModule.Configure.cs
@@ -484,10 +484,10 @@ public partial class MicroServiceApplicationsSingleModule
     {
         Configure<AbpDbContextOptions>(options =>
         {
-            AppContext.SetSwitch("Npgsql.EnableLegacyTimestampBehavior", true);//解决PostgreSql设置为utc时间后无法写入local时区的问题
-            options.UseNpgsql();
+            // AppContext.SetSwitch("Npgsql.EnableLegacyTimestampBehavior", true);//解决PostgreSql设置为utc时间后无法写入local时区的问题
+            // options.UseNpgsql();
             
-            // options.UseMySQL();
+            options.UseMySQL();
         });
     }