diff --git a/image/logo/androidlab-logo.png b/image/logo/androidlab-logo.png
new file mode 100644
index 0000000..7d012e3
Binary files /dev/null and b/image/logo/androidlab-logo.png differ
diff --git a/main.md b/main.md
index 153e8bc..62b5768 100644
--- a/main.md
+++ b/main.md
@@ -229,9 +229,9 @@ pull request 是合并请求，是指向发起一个请求请求将某一个分
 
 ---
 
-![bg left:40% 80%](image/logo/androidlab-logo.jpg)
+![bg left:40% 80%](image/logo/androidlab-logo.png)
 
-# NUC Android Lab
+# Git & GitHub
 
 本演示文档使用 [Marp](https://marp.app/) 构建