Why do troops do housework and three major steps?

When entering the army, the first thing to learn is three rules, among which the internal rules and queue rules have a good answer to this question, and all those who have really served in the army understand it. In the eyes of outsiders, the simplest statement is to cultivate a resolute, rigorous and meticulous style and temper indomitable quality with daily dribs and drabs. The so-called training for war is to improve the quality of winning on the battlefield through daily training.