[4.1、系统升级](4.1%E3%80%81%E7%B3%BB%E7%BB%9F%E5%8D%87%E7%BA%A7.md) [4.2、应用管理](4.2%E3%80%81%E5%BA%94%E7%94%A8%E7%AE%A1%E7%90%86.md) [4.3、站点设置](4.3%E3%80%81%E7%AB%99%E7%82%B9%E8%AE%BE%E7%BD%AE.md) [4.4、微信开放平台](4.4%E3%80%81%E5%BE%AE%E4%BF%A1%E5%BC%80%E6%94%BE%E5%B9%B3%E5%8F%B0.md) [4.5、附件设置](4.5%E3%80%81%E9%99%84%E4%BB%B6%E8%AE%BE%E7%BD%AE.md)