设定系统定时关机。到达设定时间后，系统还会弹出DOS窗口询问是否关机。

通过这个小程序可以提醒工作过分刻苦的同志们要注意休息啊！-Set the system off at a certen time. When approach the time, the system will pop-up a DOS window asked if shutdown or not. Through this small program, hardworking comrades can be reminded that they should have a rest.