Vovinam and most developed in Vietnam with more than 60 schools around the world, including Poland, Belgium, Cambodia, Denmark, Germany, the United States, Morocco, Norway, Russia, France, Romania, Switzerland, Sweden, Singapore, Uzbekistan, Thailand, Italy, Australia, India, Iran, Spain, Algeria, Taiwan. The Chief of Vovinam Council now is Nguyễn Văn Chiếu. Vovinam is practiced with and without weapons. It is based on the "principle of between hard and soft". It includes training of the body as well as the mind. It uses force and reaction of the opponent. Vovinam also includes hand, elbow, kicks, escape- and levering techniques. Both attack and defense
Martial law in Taiwan in April 1948. In December 1948, in the face of the mounting nationalists' defeats, Chiang Kai-shek announced the imposition of martial law throughout the country. However, remote areas such as Xinjiang, Tibet, Qinghai, as well as Taiwan Province are not within the scope of the influence. On 20 May 1949, Taiwan Province was officially included under the influence of the martial law. After the surrender of Japan in 1945, the ROC obtained control of Taiwan. In December 1949, the ROC government, led by President Chiang Kai-shek, retreated from Nanjing to Taipei, Taiwan's largest city. The ROC continued to claim sovereignty