To understand the value of , one must first understand the teacher. David Cohen is a lifelong martial artist and a senior student of the legendary Master William C.C. Chen—a direct disciple of the iconic Professor Cheng Man-Ch’ing (often referred to as the "Father of Tai Chi in the West").

Here is what the "Full" system includes:

For those looking to engage with David Cohen's full body of work, several resources are available:

This is the "signature move" of the Yang style. In a demonstration, Cohen does not just move his arms. He dissects the four primary energies within this single sequence: