"Holding" means holding or locking the opponent under control. The tiger-claw and the eagle-claw are two skills frequently used in this type of attack. The holds are executed in such a way that the opponent's bone-joints are locked under control; or the opponent's muscles or blood vessels are grasped with such force that the affected parts become numb. Shaolin martial arts is famous for its "Seventy-two Holds" It must be emphasised that this classification of attack methods into four main systems is arbitrary and for the convenience of study. It is interesting to note that many other popular forms of martial arts specialize in one or another of these four groups of attack.
That is the main systerm for chinese martial arts.