One of the most difficult things to do in the CTS system is to keep the elbows in. Master says “the elbow must be no more than 3 inches from the ribcage.”
While we cannot take these words literally, it does remind us just how important it is to keep the elbows in. While the hand moves outwards, the elbow must always have the orientation of moving towards the center, or the Dantian.
Here, Master Chen Zhonghua uses rubber cords to ties the students down at the elbow so that they will always keep their elbows in.