Please wait while Jenkins is getting ready to work...(Jenkins访问资源慢的问题)

<?xml version='1.1' encoding='UTF-8'?>
<sites>
  <site>
    <id>default</id>
    <url>http://mirror.xmission.com/jenkins/updates/update-center.json</url>
  </site>
</sites>

<?xml version='1.1' encoding='UTF-8'?>
<sites>
  <site>
    <id>default</id>
    <url>https://mirrors.tuna.tsinghua.edu.cn/jenkins/</url>
  </site>
</sites>