According to a common folklore regarding her encounter with the well-known Hung Ga practitioner and future spouse Wong Fei-Hung, in 1911, Wong Fei-Hung and his students were performing lion dance during the Dragon Boat Festival in Foshan, when one of his shoes accidentally slipped out and hit the face of the then 19-year old Mok who was observing the dance.

In Mok Kwai-lan's interview with Andre Lam of Real Kung Fu (真功夫) made in 1976, she made no mentions of that fateful incident, and stated that Wong Fei-hung was a friend to her uncle and they would often had meals and chats at her uncle's house.

[2] Wong also taught Mok Hung Ga, and she helped Wong to oversee the operations of his training ground, traditional medicine shop Po Chi Lam (寶芝林), and Dit Da clinic, where she performed all kinds of duties as a shopkeeper, a Dit Da healer, a physician, a cook, and a martial arts instructor, leading a busy life.

Dang and Lam Sai-wing (林世榮) later helped Mok and Wong's surviving sons to move to Hong Kong in 1936, where Mok opened a Dit Da Clinic (黃飛鴻授妻莫桂蘭精醫跌打) and reopened the traditional medicine shop Po Chi Lam there.

From 1944 to 1969, she served as an assistant instructor to Wong's student Dang Fong and taught Hung Gar to their students at the Wong Fei-hung National Art Society (黃飛鴻國術館) located on Gloucester Road in Hong Kong's Wan Chai area.

[4] Li Chan-wo and his students continues to pass on Wong Fei-hung's martial arts and medical practices to the future generations.