diff --git a/404.html b/404.html
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+++ b/404.html
@@ -0,0 +1,238 @@
+<!DOCTYPE html>
+<!-- saved from url=(0035)https://codechina.csdn.net/404.html -->
+<html>
+  <head>
+    <meta http-equiv="Content-Type" content="text/html; charset=windows-1252" />
+    <meta content="width=device-width, initial-scale=1, maximum-scale=1" name="viewport" />
+    <link
+      rel="shortcut icon"
+      type="image/png"
+      href="https://codechina.csdn.net/uploads/-/system/appearance/favicon/1/logo_icon.png"
+      id="favicon"
+      data-original-href="/uploads/-/system/appearance/favicon/1/logo_icon.png"
+    />
+    <title>开源开发者加速空间</title>
+    <style>
+      body {
+        color: #666;
+        text-align: center;
+        font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
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+        color: #456;
+        font-size: 20px;
+        font-weight: 400;
+        line-height: 28px;
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+
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+        margin: 18px auto;
+        border: 0;
+        border-top: 1px solid #eee;
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+
+      img,
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+        display: block;
+        margin: 40px auto;
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+        font-weight: 400;
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+    </a>
+    <h1>404</h1>
+    <div class="container">
+      <h3>The page could not be found or you don't have permission to view it.</h3>
+      <hr />
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+      ;(function () {
+        var goBack = document.querySelector('.js-go-back')
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+        if (history.length > 1) {
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+  </body>
+</html>
