Chen Huiyuan's legs bend 30 degrees. When standing the pile, your feet should be shoulder-width, your toes should be buckled 30 degrees, your body should be upright, your lower abdomen should be relaxed, and your center of gravity should be placed between your feet. However, with the center of the sole of the foot as the stress point, the legs are slightly flexed, the tongue is against the upper jaw, the lower jaw is miniature, the shoulders sink, the elbows droop, and the hands naturally droop on the legs and look forward.