In the 1920s Lum Sang, one of the youngest of Cheung's students in Hong Kong, was fortunate enough to meet and study with Lee Siem See during one of Lee Siem See's trips to Hong Kong to establish a Buddhist temple (Chuk Lam Sim Yuen). Lum studied and traveled with Lee for the next seven years. In the 1930s, Lum returned to Hong Kong and opened a Kwong Sai Jook Lum Temple Tong Long Pai school in Kowloon. Lum Wing Fay was described as being small in stature, being only 5'2" and 120 lbs. In practise, he placed emphasis on softness, redirection and explosive energy and his students continue to display those traits. In 1942, Lum Sang emigrated to the United States and settled in the Chinatown of New York City. He started teaching in Chinatown's Hakka Association, the New York Hip Sing Tong at Pell Street. In the late 1950s, he taught at Free Mason Association Athletic Club, also known as Hung Ching. By 1963, his Kwong-Sai Jook Lum Gee Tong Long Pai was one of the largest kung fu schools. In 1969, Lam Sang retired from teaching and migrated to Taiwan. Sifu Lam Sang did however return to New York City and resided at 22 Mott Street, NY Chinese Free Mason Association Headquarters. Sifu Lam Sang continued to teach select few from the Free Mason Association Athletic Club prior to his passing in 1991 and is not widely known as to the identities of his last group of disciples. His senior students such as Chin Ho Doon, Harry Sun, Wong Buk Lam, Gin Foon-Mark (), Henry Poo Yee() and Louie Jack Man would establish themselves as teachers after Lum Sang retired. All of these men have promoted this art in the United States and around the world.