Check out these useful links for Sing Ong and Cheng Man-Ch’ing Tai Chi Chuan:

Sing Ong Tai Chi International


Sing Ong Tai Chi Canada


Huang Sheng Shyan
[Wikipedia entry]


Cheng Man-Ch’ing Biography Project


Cheng Tze Tai-Chi Chuan Study Association
[founded by Cheng Man-Ch’ing]


Cheng Man Ching: Master Tapes


more links coming soon . . .