The term San Sau is used in many styles of traditional Chinese Kun Fu. The first word "San" means "mix, mix" and the second "Sau" means "hands". Together, they refer to fighting techniques with hands that help the understanding and application of the martial aspects of Tai Chi Chuan. These techniques are a sequence of martial applications derived from normal shape and arranged in a predetermined choreography for two or more. Today, it is called "Dui da" meaning whole fight. If two people are involved, it adds the word "two" and one says "Seung Yan Dui da" and so on.
In the Yang style Tai Chi Chuan, there is a San Sau or Seung Yan Dui Da. Only a small number of schools in Tai Chi Chuan teaches the original period; recently, however, a number of schools have created their own San Sau. Traditionally, this exercise is taught only competent practitioners in the long form, push hands and your read. This is an important aspect of exercises to practice energy
experiential partner practice such as push hands, ta lu or martial applications.