The Mandarin Magician (1974)

Karate expert and journalist Mr. Chi (Li Chin Kun) goes to Thailand to assist a close friend, Nai Sin (Huang Chung Hsin), in preparing his Muay Thai boxers for a battle with Japanese boxers who have arrived in Bangkok to get even for a past loss. Instead of training Nai Sin's students to take on the Japanese, Mr. Chi finds himself having to take on the Japanese himself.