Wing Chun like other styles of martial arts contains the section of painful techniques. It is called chin-na in Chinese martial arts. Many movements in the form Siu Leem Tau and in "Form 108 on the wooden dummy" are masked and hidden techniques of chin-na. This book deciphers the movement of the forms of Wing Chun that are used for escaping from grips. This is the first level of chin-na in Wing-Chun.The purpose of the book is to summarize the principles of escaping from the grips, and not to collect all the techniques. The main thing is not the maximum number of techniques, but an understanding of biomechanics and principles of escaping from grips.