It's just that petty officers get paid
Main training in XinBingLian: queuing, capturing the enemy, tactics and physical fitness.
The queue includes: single soldier queue, class train and three shifts and four posts.
Capture the enemy: including posture and pace, fist, leg, attack prevention and capture the enemy.
Tactics: the main training is individual tactics, including: lying down: lying down with a gun, lying down with a gun; Action posture: low posture prone, high posture prone, sideways prone, high posture sideways prone and rolling in (rolling in between stops and rolling in between actions).
Physical fitness: including 5km cross-country, 100m sprint, leapfrog, push-ups, one-legged stretching, combined gymnastics, etc.