diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 4cde952..8b255da 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -9,26 +9,21 @@
 
 2. 通过如下命令从你的 Github 帐号 `clone` 库： 
 
-```
-    git clone git@github.com:your_github_username/linux-insides.git
-```
+     git clone git@github.com:your_github_username/linux-insides.git
+
 
 3. 通过如下命令创建分支 (`branch`) :
 
-```
-    git checkout -b "linux-insides-zh-fix"
-    # linux-insides-zh-fix is just an example
-```
+     git checkout -b "linux-insides-zh-fix"
+     # linux-insides-zh-fix is just an example
 
 4. 对本地库进行修改。
 
 5. 提交自己的修改，然后推送 (`push`) 到远端。
 
-```
-    git add your_changed_files
-	git commit -m "your comment"
-    git push --set-upstream origin linux-insides-zh-fix
-```
+     git add your_changed_files
+     git commit -m "your comment"
+     git push --set-upstream origin linux-insides-zh-fix
 
 6. 点击 `New pull request` 按钮，将 your_github_username 库的 linux-insides-zh-fix 分支的修改提交到 MintCN 的 `linux-insides-zh` 库中。