diff --git a/Api/Ewide.Core/Entity/SysAreaCode.cs b/Api/Ewide.Core/Entity/SysAreaCode.cs
index f6eea58..74b7ed8 100644
--- a/Api/Ewide.Core/Entity/SysAreaCode.cs
+++ b/Api/Ewide.Core/Entity/SysAreaCode.cs
@@ -37,10 +37,20 @@ namespace Ewide.Core
 
         [Comment("排序")]
         public int Sort { get; set; }
+
         /// <summary>
         /// 父节点就是去掉后面两位
         /// </summary>
-        public string ParentCode => LevelType>1?Code[0..(Code.Length-2)]:string.Empty;
+        public string ParentCode => LevelType switch
+        {
+            // 市级 => 没有父级           3302
+            1 => string.Empty,
+            // 区级 => 6位取4位得到市级    330201
+            2 => Code[0..(Code.Length - 2)],
+            // 其他 => 去除后3位得到上级   330201001
+            _ => Code[0..(Code.Length - 3)],
+        };
+
         /// <summary>
         /// 多个区域有多个用户绑定自定义数据
         /// </summary>