Vovinam to demonstrate Vovinam publicly in Hanoi with his disciples in 1940, Nguyễn was invited to teach the art at Hanoi's Ecole Normale, and Vovinam gained in popularity. During the following years, political unrest increased throughout Vietnam; due to the system's nationalist political orientation, the art came under suppression. By 1954, Nguyễn had emigrated to South Vietnam, where he was able to continue to teach and establish Vovinam schools. After his death in 1960, Grandmaster Le Sang continued the development and international promotion of Vovinam until his own death on September 27, 2010. The first Vovinam school outside of Vietnam was
Chinese martial arts are styles that mimic movements from animals and others that gather inspiration from various Chinese philosophies, myths and legends. Some styles put most of their focus into the harnessing of qi, while others concentrate on competition. Chinese martial arts can be split into various categories to differentiate them: For example, "external" () and "internal" (). Chinese martial arts can also be categorized by location, as in "northern" () and "southern" () as well, referring to what part of China the styles originated from, separated by the Yangtze River (Chang Jiang); Chinese martial arts may even be classified according to their