diff --git a/static/src/img/index/bg/bg.jpg b/static/src/img/index/bg/bg.jpg
new file mode 100644
index 0000000..fe2719e
Binary files /dev/null and b/static/src/img/index/bg/bg.jpg differ
diff --git a/static/src/img/index/bg/bg3.jpg b/static/src/img/index/bg/bg3.jpg
deleted file mode 100644
index 5c4b58f..0000000
Binary files a/static/src/img/index/bg/bg3.jpg and /dev/null differ
diff --git a/template/src/oj/index.html b/template/src/oj/index.html
index e5e1b0f..86bf07f 100644
--- a/template/src/oj/index.html
+++ b/template/src/oj/index.html
@@ -105,7 +105,7 @@
         }
 
         #section0{
-            background-image: url(/static/img/index/bg/bg3.jpg);
+            background-image: url(/static/img/index/bg/bg.jpg);
             padding: 0 0 0 0;
         }