diff --git a/类型映射.md b/类型映射.md
index acfcf0b..6a78278 100644
--- a/类型映射.md
+++ b/类型映射.md
@@ -42,8 +42,6 @@
 ```csharp
 class Table
 {
-    public int id { get; set; }
-
     [Column(MapType = typeof(string))]
     public PeopleType t1 { get; set; }