Tony Chan is a disciple of master Koo Sang and was authorized to teach in 1978.

Koo Sang is best known for making Yip Man's wooden dummy and producing dummies until he retired in 1995. 90% of the Mook Yan Jongs made today are modelled after Koo Sang's dummies.

Lineage: Yip Man -> Koo Sang -> Tony Chan