diff --git a/_config.yml b/_config.yml
index 7fbbd42..4130b82 100644
--- a/_config.yml
+++ b/_config.yml
@@ -81,7 +81,7 @@ analytics:
 # Site Author
 author:
   name             : "Qiang Li"
-  avatar           : "liqiang-pic.jpg"
+  avatar           : "liqiang-pic-compress.jpg"
   bio              : "PhD student"
   location         : "Shanghai, China"
   employer         : "Fudan University"
diff --git a/images/liqiang-pic-compress.jpg b/images/liqiang-pic-compress.jpg
new file mode 100644
index 0000000..036aa32
Binary files /dev/null and b/images/liqiang-pic-compress.jpg differ
diff --git a/index.md b/index.md
deleted file mode 100644
index de055e4..0000000
--- a/index.md
+++ /dev/null
@@ -1,2 +0,0 @@
-123213123
-must
\ No newline at end of file