 Gan Dak Hoi later invited Chan to study kung fu everyday and to help manage his school in Hong Kong.At the age of 16 years Chan quit his regular school and became a full-time teaching assistant to Gan Dak Hoi at the Hong Kong school.Chan Sau Chung also learned Da Sheng Pi Gua from Gan Dak Hoi, who in turn had learned it from its founder Kau Sei (Kou Si) 寇四.