It is therefore East, West, North, South, and Center. In the human body, it is left hand, right hand,, feet and huiyin. There are two feet but they only represent one direction: the lower/bottom position. They are split from the point of Dantian into two. Because they are one of the same, it is not a matter of which foot the weight should be on when we talk about double weight or double heavy.
Double heavy is a problem in the synchronization of the, hands and foot. It takes at least ten years of practice to have a basic grasp of what this means.
The original of this was in a note form hand written by Chen Zhonghua.