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Full Lineage:
Leung Yee Tai > Dr. Leung Jan (Leung Tak Wing) > Leung Bik > Ip Man 葉問 (Yip Gai-Man) > K.T. Chao
Best known for writing the 3 "Secrets of Wing Chun Kung-Fu" books. Commonly believed to just be a student (non-disciple) of Yip Man, though little is known. His books don't say what level he attained.