diff --git a/入门.md b/入门.md
index ca20006..ff6170d 100644
--- a/入门.md
+++ b/入门.md
@@ -38,7 +38,7 @@ Install-Package FreeSql.Provider.Sqlite
 ```
 ## 声明
 ```csharp
-static IFreeSql fsql = new FreeSql.FreeSqlBuilder()
+IFreeSql fsql = new FreeSql.FreeSqlBuilder()
     .UseConnectionString(FreeSql.DataType.Sqlite, @"Data Source=db1.db")
     .UseAutoSyncStructure(true) //自动同步实体结构到数据库
     .Build(); //请务必定义成 Singleton 单例模式