肘底看捶--借力打力，合開的力量。
Under-elbow punch -- The Power of Closing & Opening; borrowing strength to strike.
Training moments with Master Charlie Chang recorded by Daniel Lee (李愷), 11 Apr 2009.
王氏水性太極拳拳架、技法、及應用，由張希榮師傅親述及示範。
Wang's Water Style Tai Chi Chuan forms, techniques, and applications as explained and demonstrated by Master Charlie Chang.