The author has spent over 25 years studying martial arts, ten of those in China. This text explains basics throws and locks in a clear and easily understood manner. The emphasis is on effective throwing without the use of brute force. Cartmell discusses the correct angles and execution of throws with particular and important emphasis on each step correctly applied. He also gives a good section on General Principles which can not only be applied to other grappling but indeed all martial arts. Each throw is demonstrated by the author and show a number of times.