猜单双是什么游戏

简介：But all of a sudden, the formation of the officers and soldiers suddenly changed again. Because there are only 500 people and they practice strictly every day, the formation change speed is quite fast and there is no sloppiness at all. At 200 steps, the officers and soldiers were still in a straight formation. By the time of 100 steps, the formation of the officers and soldiers had changed greatly, from a straight formation in the north and south to a square formation in the east and west.