This is the Wing Chun School Family Chi Sau, developed by Sifu Garry McKenzie. This advanced form of Chi Sau deals with mid-range techniques and kicks. Students start off in the Man Sau -> Wu Sau (Inquisitive & Protective Hands) position to go pass the partners front barrier (Man Sau), then the Pak Sau (Slap Hand) and punch is applied. This goes back and forth in a continuous flow.
**The Pak Sau Chi Sau was developed by Sifu Garry McKenzie, because he found in his experience in combat that although close-quarter was not a problem, in long to mid-range there was in closing the gap. There was not as yet as drill to practice mid-range manuevers. After a year of research, the Pak Sau Chi Sau was patterned to give more mobility whilst not taking away or adding anything to the Wing Chun System as a whole. The main aim of this Chi Sau is to deal effectively with bridges & closing the gap.