When the user clicks that icon, a request goes in the background to the server with information about which box the user wants to subscribe to.

当用户单击此图标时，一个请求将在后台发往服务器，其中带有用户希望订阅的对话框的相关信息。

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In particular, a background process should never display a dialog or window in which the user is required to change Settings or supply information.

特别地，后端进程绝不应该显示一个对话框或者窗口来要求用户更改设置或者提供信息。

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The database manage is operated in the Background. The function of songs add, delete and upgrade user information are also operated in the background.

后台主要用于数据库的管理，管理员对影视歌曲的添加、删除、更新及对注册会员和音乐新闻的管理、系统的维护等功能。

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