Yuen Kay San started training in the early 1900's under the renowned constable Fok Bo-Chuen. When his studies with Fok were complete, he became a student of the famed marshal Fung Siu-Ching. Yuen Kay San lived from 1889 until 1956, and with his passing, Shum Nung (Yuen Kay San's first student and only disciple) named the style Yuen Kay San Wing Chun Kuen, in honor and memory of his teacher.

Lineage 1: Fung Siu-Ching -> Yuen Kay San
Lineage 2: Fok Bo Cheung -> Yuen Kay San