Etiquette standing steps

Hello, feet flat, about shoulder width (not splayed); The shoulders are flat and the back is straight; Hands crossed (boys' left hand is outside, girls' right hand is outside); Neck straight, chin slightly chin, face straight ahead. When standing, don't bend your neck, waist and legs. In some formal occasions, it is not advisable to put your hands in your trouser pockets or cross your chest, and don't make some small moves subconsciously. This will not only appear stiff, give people a sense of lack of self-confidence, but also lose the dignity of manners.