diff --git a/IRaCIS.Core.API/appsettings.Event_IRC.json b/IRaCIS.Core.API/appsettings.Event_IRC.json
index 2e9f86342..216571d78 100644
--- a/IRaCIS.Core.API/appsettings.Event_IRC.json
+++ b/IRaCIS.Core.API/appsettings.Event_IRC.json
@@ -14,6 +14,7 @@
     "ObjectStoreUse": "AliyunOSS",
     "AliyunOSS": {
       "regionId": "cn-shanghai",
+      "internalEndpoint": "https://oss-cn-shanghai-internal.aliyuncs.com",
       "endpoint": "https://oss-cn-shanghai.aliyuncs.com",
       "accessKeyId": "LTAI5tKvzs7ed3UfSpNk3xwQ",
       "accessKeySecret": "zTIceGEShlZDGnLrCFfIGFE7TXVRio",
diff --git a/IRaCIS.Core.API/appsettings.Prod_IRC.json b/IRaCIS.Core.API/appsettings.Prod_IRC.json
index 02e0a3b74..7b2b1d376 100644
--- a/IRaCIS.Core.API/appsettings.Prod_IRC.json
+++ b/IRaCIS.Core.API/appsettings.Prod_IRC.json
@@ -16,6 +16,7 @@
     "ObjectStoreUse": "AliyunOSS",
     "AliyunOSS": {
       "regionId": "cn-shanghai",
+      "internalEndpoint": "https://oss-cn-shanghai-internal.aliyuncs.com",
       "endpoint": "https://oss-cn-shanghai.aliyuncs.com",
       "accessKeyId": "LTAI5tKvzs7ed3UfSpNk3xwQ",
       "accessKeySecret": "zTIceGEShlZDGnLrCFfIGFE7TXVRio",
diff --git a/IRaCIS.Core.API/appsettings.Test_IRC.json b/IRaCIS.Core.API/appsettings.Test_IRC.json
index e3d28221d..b0093efe9 100644
--- a/IRaCIS.Core.API/appsettings.Test_IRC.json
+++ b/IRaCIS.Core.API/appsettings.Test_IRC.json
@@ -18,6 +18,7 @@
 
     "AliyunOSS": {
       "regionId": "cn-shanghai",
+      "internalEndpoint": "https://oss-cn-shanghai-internal.aliyuncs.com",
       "endPoint": "https://oss-cn-shanghai.aliyuncs.com",
       "accessKeyId": "LTAI5tKvzs7ed3UfSpNk3xwQ",
       "accessKeySecret": "zTIceGEShlZDGnLrCFfIGFE7TXVRio",
diff --git a/IRaCIS.Core.API/appsettings.US_Prod_IRC.json b/IRaCIS.Core.API/appsettings.US_Prod_IRC.json
index 8957701a9..0c7ed8158 100644
--- a/IRaCIS.Core.API/appsettings.US_Prod_IRC.json
+++ b/IRaCIS.Core.API/appsettings.US_Prod_IRC.json
@@ -17,6 +17,7 @@
     "ObjectStoreUse": "AWS",
     "AliyunOSS": {
       "regionId": "cn-shanghai",
+      "internalEndpoint": "https://oss-cn-shanghai-internal.aliyuncs.com",
       "endPoint": "https://oss-cn-shanghai.aliyuncs.com",
       "accessKeyId": "",
       "accessKeySecret": "",
diff --git a/IRaCIS.Core.API/appsettings.US_Test_IRC.json b/IRaCIS.Core.API/appsettings.US_Test_IRC.json
index 815a762e3..67d4b1fe7 100644
--- a/IRaCIS.Core.API/appsettings.US_Test_IRC.json
+++ b/IRaCIS.Core.API/appsettings.US_Test_IRC.json
@@ -16,6 +16,7 @@
     "ObjectStoreUse": "MinIO",
     "AliyunOSS": {
       "regionId": "cn-shanghai",
+      "internalEndpoint": "https://oss-cn-shanghai-internal.aliyuncs.com",
       "endPoint": "https://oss-cn-shanghai.aliyuncs.com",
       "accessKeyId": "LTAI5tKvzs7ed3UfSpNk3xwQ",
       "accessKeySecret": "zTIceGEShlZDGnLrCFfIGFE7TXVRio",
diff --git a/IRaCIS.Core.API/appsettings.US_Uat_IRC.json b/IRaCIS.Core.API/appsettings.US_Uat_IRC.json
index d3f3950c8..87b6305f1 100644
--- a/IRaCIS.Core.API/appsettings.US_Uat_IRC.json
+++ b/IRaCIS.Core.API/appsettings.US_Uat_IRC.json
@@ -20,6 +20,7 @@
 
     "AliyunOSS": {
       "regionId": "cn-shanghai",
+      "internalEndpoint": "https://oss-cn-shanghai-internal.aliyuncs.com",
       "endPoint": "https://oss-cn-shanghai.aliyuncs.com",
       "accessKeyId": "LTAI5tKvzs7ed3UfSpNk3xwQ",
       "accessKeySecret": "zTIceGEShlZDGnLrCFfIGFE7TXVRio",
diff --git a/IRaCIS.Core.API/appsettings.Uat_IRC.json b/IRaCIS.Core.API/appsettings.Uat_IRC.json
index d88154228..775d9d17e 100644
--- a/IRaCIS.Core.API/appsettings.Uat_IRC.json
+++ b/IRaCIS.Core.API/appsettings.Uat_IRC.json
@@ -16,6 +16,7 @@
 
     "AliyunOSS": {
       "regionId": "cn-shanghai",
+      "internalEndpoint": "https://oss-cn-shanghai-internal.aliyuncs.com",
       "endpoint": "https://oss-cn-shanghai.aliyuncs.com",
       "accessKeyId": "LTAI5tKvzs7ed3UfSpNk3xwQ",
       "accessKeySecret": "zTIceGEShlZDGnLrCFfIGFE7TXVRio",
diff --git a/IRaCIS.Core.Application/Helper/OSSService.cs b/IRaCIS.Core.Application/Helper/OSSService.cs
index 93c6c62bb..9d5a754ad 100644
--- a/IRaCIS.Core.Application/Helper/OSSService.cs
+++ b/IRaCIS.Core.Application/Helper/OSSService.cs
@@ -39,6 +39,9 @@ namespace IRaCIS.Core.Application.Helper
         public string regionId { get; set; }
         public string accessKeyId { get; set; }
         public string accessKeySecret { get; set; }
+
+        public string internalEndpoint { get; set; }
+
         public string endPoint { get; set; }
         public string bucketName { get; set; }
 
@@ -144,7 +147,7 @@ namespace IRaCIS.Core.Application.Helper
                 {
                     var aliConfig = ObjectStoreServiceOptions.AliyunOSS;
 
-                    var _ossClient = new OssClient(aliConfig.endPoint, aliConfig.accessKeyId, aliConfig.accessKeySecret);
+                    var _ossClient = new OssClient(aliConfig.internalEndpoint, aliConfig.accessKeyId, aliConfig.accessKeySecret);
 
 
 
@@ -220,7 +223,7 @@ namespace IRaCIS.Core.Application.Helper
             {
                 var aliConfig = ObjectStoreServiceOptions.AliyunOSS;
 
-                var _ossClient = new OssClient(aliConfig.endPoint, aliConfig.accessKeyId, aliConfig.accessKeySecret);
+                var _ossClient = new OssClient(aliConfig.internalEndpoint, aliConfig.accessKeyId, aliConfig.accessKeySecret);
 
                 // 上传文件
                 var result = _ossClient.PutObject(aliConfig.bucketName, ossRelativePath, localFilePath);
@@ -279,7 +282,7 @@ namespace IRaCIS.Core.Application.Helper
                 {
                     var aliConfig = ObjectStoreServiceOptions.AliyunOSS;
 
-                    var _ossClient = new OssClient(aliConfig.endPoint, aliConfig.accessKeyId, aliConfig.accessKeySecret);
+                    var _ossClient = new OssClient(aliConfig.internalEndpoint, aliConfig.accessKeyId, aliConfig.accessKeySecret);
 
                     // 上传文件
                     var result = _ossClient.GetObject(aliConfig.bucketName, ossRelativePath);
@@ -351,7 +354,7 @@ namespace IRaCIS.Core.Application.Helper
                 {
                     var aliConfig = ObjectStoreServiceOptions.AliyunOSS;
 
-                    var _ossClient = new OssClient(aliConfig.endPoint, aliConfig.accessKeyId, aliConfig.accessKeySecret);
+                    var _ossClient = new OssClient(aliConfig.internalEndpoint, aliConfig.accessKeyId, aliConfig.accessKeySecret);
 
                     // 生成签名URL。
                     var req = new GeneratePresignedUriRequest(aliConfig.bucketName, ossRelativePath, SignHttpMethod.Get)