diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 8b255da..4cde952 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -9,21 +9,26 @@
 
 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。