Taiji Trinity
Principle: Separation of Yin and Yang
Concept: Indirect Power
Action: In with elbow no hand, out with hand no elbow.
These are three ways of describing taiji. They are one and the same.
Master Chen Zhonghua discussed the above during a Q&A session at the North American Practical Method Training Camp from Jul 29 to Aug 2, 2017.
Source: https://practicalmethod.com/?p=51478