Main point: The rolling must be sucked without floating; surmount knee joint conveniently with smooth and evasive without hard-going.
Main point: The rolling must be sucked without floating; surmount knee joint conveniently with smooth and evasive without hard-going.
要领：滚法要吸定，不要发漂，在膝关节处要顺势越过，不要发涩，要圆滑流畅。