In the process of marching in line, you should adjust your pace, shout slogans, sing in line, and then go to the restaurant This is how "a song before a meal" came about. Songs should have their own momentum, otherwise they will be looked down upon by other units. Washing dishes and chopsticks after meals is also to cultivate one's own quality. After washing, put it in a fixed position, which is beneficial for one person to stand guard and other comrades to leave meals.