After that he studied taekwondo with friend and actor Kim Tai Chung It was at this stage of his life that Lee began studying also the Korean martial art of hapkido under the direction of Hwang In-Shik.
A great popularizer of the art in Asia through his work in the Hong Kong based films of Bruce Lee, Jackie Chan and Angela Mao, he is known nevertheless as one the top teachers of the art and was eventually awarded a 10th degree black belt, the highest rank possible in the art, by the World Hapkido Association.
Before that he had already made his appearance in a movie called Hapkido (aka Lady Kungfu) together with Angela Mao.