如何使服务器前端的维护页面，当你重新启动后台服务？
How to enable a maintenance page on the frontend server while you are restarting the backend service?
为了简化维护页面任务，需要使用不同的模板信息“标记”需要注意的页面。
In order to simplify the task of maintaining the pages, various Template Messages are used to "tag" pages requiring attention.
在更为复杂的场景中，仅仅使用单个项维护页面以及将页面转换与上下文传递相结合并不能够满足需求。
In a more complicated scenario, simply maintaining context with a single item and requiring page transitions to be coupled with context transmission may not be sufficient.
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