diff --git a/docs/notes/剑指 Offer 题解 - 3~9.md b/docs/notes/剑指 Offer 题解 - 3~9.md
index 640b0991..ecc5c2a1 100644
--- a/docs/notes/剑指 Offer 题解 - 3~9.md
+++ b/docs/notes/剑指 Offer 题解 - 3~9.md
@@ -300,11 +300,11 @@ public class TreeLinkNode {
① 如果一个节点的右子树不为空，那么该节点的下一个节点是右子树的最左节点；
-
+
② 否则，向上找第一个左链接指向的树包含该节点的祖先节点。
-
+
```java
public TreeLinkNode GetNext(TreeLinkNode pNode) {
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diff --git a/notes/剑指 Offer 题解 - 3~9.md b/notes/剑指 Offer 题解 - 3~9.md
index 07f91d53..cf27ec2e 100644
--- a/notes/剑指 Offer 题解 - 3~9.md
+++ b/notes/剑指 Offer 题解 - 3~9.md
@@ -300,11 +300,11 @@ public class TreeLinkNode {
① 如果一个节点的右子树不为空，那么该节点的下一个节点是右子树的最左节点；
-
+
② 否则，向上找第一个左链接指向的树包含该节点的祖先节点。
-
+
```java
public TreeLinkNode GetNext(TreeLinkNode pNode) {
