Wushu master *** 13 long fist is wrong. Tai Ji Chuan, also known as the Thirteen Movements of Changquan, doesn't mean thirteen moves. Note that this is potential, not form. Potential refers to a change, which represents all technical changes of power with eight forces, that is, pushing, sliding, squeezing, pressing, picking, elbowing and leaning, that is to say, a station must have the ability to push and squeeze.