Cheng Man-Ching left us TCC practitioners with a treasure trove of insight into the TCC Classics. For example, he advocated “beautiful lady's hand,”“no arms in TCC (NAIT)”, and “investment in loss,” all of which are as important and beneficial as they are profound, counterintuitive, and often perplexing.
Let me tackle NAIT here.
The eight hand methods (ward off, rollback, press, push, pluck, split, elbow, and shoulder) and the five sticking methods (which boil down to always engaging but never resisting) are the first two of three core competencies that all pushing hands practitioners should strive to master.
Here is a rule of wisdom for the wise. Nothing compels anyone to follow it, but if you do, it will helps you advance your mastery of PH.