>/> >/> ，
!doctype html public "-/ xhtml 1.0 >
html >
head>
meta -equiv="content-type" ; charset=gb2312"/>
title>500 - ?????????????/title>
/head>
body>
h1>??????????/h1>
h2>500 - ?????????????/h2>
h3>?????????????????????????????/h3>
/body>
/html>
>/> >/> ，
https://guangyinzhiwai.com/book/73981/28835644.html