diff --git a/.idea/vcs.xml b/.idea/vcs.xml
deleted file mode 100644
index 16d3f00..0000000
--- a/.idea/vcs.xml
+++ /dev/null
@@ -1,7 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project version="4">
-  <component name="VcsDirectoryMappings">
-    <mapping directory="$PROJECT_DIR$" vcs="Git" />
-    <mapping directory="$PROJECT_DIR$/src/github.com/esrrhs/pingtunnel" vcs="Git" />
-  </component>
-</project>
\ No newline at end of file
diff --git a/network.jpg b/network.jpg
new file mode 100644
index 0000000..de09b5a
Binary files /dev/null and b/network.jpg differ