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
Sinanju (martial art) ninjutsu, etc.) are all seriously diluted imitations of Sinanju. He compares the other arts to rays of sunshine with Sinanju being the sun itself. He also refers to an ancient Sinanju legend which predicts that the greatest master in the history of the art will be a dead white Night Tiger (Sinanju acolyte) "made whole by the art." Remo appears to fit the description in Chiun's estimation. There are other groups that practice diluted forms of Sinanju. These include: Sinanju (martial art) Sinanju is a fictional Korean martial art (the "Sun Source" of all martial arts) of the cult paperback