diff --git a/添加.md b/添加.md
index a5c0cd2..1ae90af 100644
--- a/添加.md
+++ b/添加.md
@@ -30,6 +30,21 @@ var t1 = fsql.Insert(items.First()).ExecuteAffrows();
 //VALUES(?Clicks0, ?Title0, ?CreateTime0)
 ```
 
+如果表有自增列，插入数据后应该要返回 id。
+
+方法1：(原始)
+```csharp
+long id = fsql.Insert(blog).ExecuteIdentity();
+blog.Id = id;
+```
+
+方法2：(依赖 FreeSql.Repository)
+```csharp
+var repo = fsql.GetRepository<Blog>();
+repo.Insert(blog);
+```
+> 将插入后的自增值，填充给 blog.Id
+
 ## 2、批量插入
 
 ```csharp