Legend has it that, in 13th-century China, the Taoist monk Zhang Sanfeng (Chang-San Feng) observed a crane and a snake fighting, and had the revelation that the soft wins over the hard, and calm tames aggression.
This led to the creation of Taijiquan, a self-defence method that encourages the development of internal energy (Qi) and leads to "immortality".
Nowadays, Taiji is widely practised around the world, whether as an art of movement , a martial art or a spiritual path.