diff --git a/TC1/http_server/web/demo.html b/TC1/http_server/web/demo.html
index 1a164c4..67c2833 100644
--- a/TC1/http_server/web/demo.html
+++ b/TC1/http_server/web/demo.html
@@ -46,7 +46,8 @@
       </header>
       <div class="demo-drawer mdl-layout__drawer mdl-color--blue-grey-900 mdl-color-text--blue-grey-50">
         <header class="demo-drawer-header">
-          <img src="http://119.23.191.79/tc1/images/user.jpg" class="demo-avatar">
+          <!-- <img src="http://119.23.191.79/tc1/images/user.jpg" class="demo-avatar"> -->
+          <svg class="demo-avatar"><use xlink:href="#img-user" /></svg>
           <div class="demo-avatar-dropdown">
             <span>hello@example.com</span>
             <div class="mdl-layout-spacer"></div>
@@ -460,6 +461,31 @@
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     </g>
+    <g id="#img-user">
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