diff --git a/IRaCIS.Core.API/_ServiceExtensions/NewtonsoftJson/JSONTimeZoneConverter.cs b/IRaCIS.Core.API/_ServiceExtensions/NewtonsoftJson/JSONTimeZoneConverter.cs
index 37853b02a..6f2623694 100644
--- a/IRaCIS.Core.API/_ServiceExtensions/NewtonsoftJson/JSONTimeZoneConverter.cs
+++ b/IRaCIS.Core.API/_ServiceExtensions/NewtonsoftJson/JSONTimeZoneConverter.cs
@@ -71,32 +71,25 @@ namespace IRaCIS.Core.API
 
             DateTime dateTime;
 
-            if (reader.ValueType == typeof(DateTime) || reader.ValueType == typeof(DateTime?))
+            // 2. 检查目标类型是否可空
+            bool isNullable = objectType == typeof(DateTime?);
+
+            var canConvert = DateTime.TryParse(reader.Value?.ToString(), out dateTime);
+
+
+            if (isNullable == false && canConvert == false)
             {
-                DateTime? nullableDateTime = reader.Value as DateTime?;
 
-
-                if (nullableDateTime != null && nullableDateTime.HasValue)
-                {
-                    dateTime = nullableDateTime.Value;
-                }
-                else
-                {
-                    return null;
-                }
+                throw new JsonSerializationException($"Could not convert string to DateTime: {reader.Value} Path {reader.Path}"); 
             }
             else
             {
-                if (DateTime.TryParse((string)reader.Value, out dateTime) == false)
+                if (canConvert == false)
                 {
-
-                    //throw new JsonSerializationException($"Could not convert string to DateTime: {reader.Value} Path {reader.Path}");
                     return null;
                 }
             }
 
-
-
             // 将客户端时间转换为服务器时区的时间
             var serverZoneTime = TimeZoneInfo.ConvertTime(dateTime, _clientTimeZone, TimeZoneInfo.Local);