diff --git a/HJGL_DS/BLL/API/APIWeldServices.cs b/HJGL_DS/BLL/API/APIWeldServices.cs
index e0439df..8c26e80 100644
--- a/HJGL_DS/BLL/API/APIWeldServices.cs
+++ b/HJGL_DS/BLL/API/APIWeldServices.cs
@@ -465,7 +465,7 @@ namespace BLL.API
                     item.AttachUrl = p.AttachUrl;
                     item.PhotoUrl = p.PhotoUrl;
                     item.IsFaceTrain = p.IsFaceTrain;
-                    item.ExchangeTime = DateTime.Now;
+                    item.ExchangeTime = DateTime.Now.ToString("yyyy-MM-dd hh:mm:ss");
                     res.Add(item); 
                 } 
                 respone.data = res; 
diff --git a/HJGL_DS/Model/APIItem/WelderItem.cs b/HJGL_DS/Model/APIItem/WelderItem.cs
index 335d92a..a22a006 100644
--- a/HJGL_DS/Model/APIItem/WelderItem.cs
+++ b/HJGL_DS/Model/APIItem/WelderItem.cs
@@ -244,7 +244,7 @@ namespace Model.APIItem
 		public DateTime? LimitDate { get; set; }
 
 
-        public DateTime? ExchangeTime { get; set; }
+        public string ExchangeTime { get; set; }
 		public string IdentityCard { get; set; }