This is a Hong Kong TV show from 2016 which is currently available on Amazon Prime. It is in Catonese with English subtitles.
The story opens on 1945 in Kowloon, a neighborhood in Hong Kong. Chiu Mang-san and Duen Tong-tin, the leaders of two competing schools of Baji (a Chinese martial art) agree to work together. Kowloon was controlled by organized crime at this time.
