diff --git a/MACA.md b/MACA.md
index 95433a6..00e591a 100644
--- a/MACA.md
+++ b/MACA.md
@@ -11,6 +11,8 @@
    gpgcheck=0
    EOF
 
+   ```bash
+   示例
    yum makecache
 
   yum install commonlib