Wushu, or Martial Art, is an important component of the cultural heritage of China, with a rich content over the centuries. Literally, "Wu" means military, and "Shu" means art. Wushu therefore means the art of fighting, or martial arts. Martial training includes Ti (kicking), Da (punching), Shuai (throwing), Na (controlling), Ji (hitting), Ci (thrusting), etc. Related to each style are basic forms, or sequences, which may involve defense strategies, offense, retreat, mobility and immobility, speed and slowness, hard or soft postures, emptiness and fullness, with or without weapons