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
Northern Shaolin (martial art) place of origin. The Northern Shaolin (北少林 denotes Henan 河南崇山少林寺 temple) style associated with Gu Ruzhang was first taught to a lay disciple, the celebrated 18th century master Gan Fengchi of Jiangsu Province, by a Shaolin monk named Zhao Yuan, born Zhu Fu, a member of the Ming royal family who joined the sangha after the Ming was overthrown by the Qing in 1644. (Gan is also remembered for founding the martial art Huāquán 花拳, literally "flower fist", about which he wrote the book "Introduction to Huāquán".) Gan in turn taught Wan Bangcai, who taught Yan Degong, who taught Yan