diff --git a/01.SimpleFactory/01.SimpleFactory.md b/01.SimpleFactory/01.SimpleFactory.md
index 36859f8..d8cd623 100644
--- a/01.SimpleFactory/01.SimpleFactory.md
+++ b/01.SimpleFactory/01.SimpleFactory.md
@@ -28,7 +28,7 @@
 ![avatar](.//1.Picture//简单工厂模式.png)  
 
 代码结构如下：
-```
+``` {.line-numbers}
 //抽象产品类AbstractProduct
 class AbstractProduct
 {