Tchoung Ta-tchen or Zhong Dazhen was a martial arts teacher from China who developed his own version of Yang-style tai chi.
As a young man Tchoung studied his family's style of tai chi and tui na (massage).
[citation needed] In 1943, he studied qigong and tai chi with Abbott Hui Kung, at the Omei Monastery in Sichuan province.
The association made Tchoung a delegate and he traveled to Africa to teach tai chi to President Bongo of Gabon.
[citation needed] His students who continue to teach his system include Andrew Dale, Harvey Kurland, Tim Glasheen, Peter Dickson, Laurens Lee, and Donald Scott.
Tchoung taught his evolving version of tai chi in Vancouver, British Columbia, and in Seattle, Washington.
There are several teachers of his system who are currently teaching, including the following direct students in the United States: Andrew Dale, David Harris, Don Scott in Seattle, Washington and Harvey Kurland in Riverside, California.
"Tchoung felt the previous generation's skill being lost or watered down was due to the concept of always holding a little back from the student (as well as intentional persecuting of the art and modernizing it on the mainland).