Open and close the kua

My attempt to recount what Master Chen said the morning of 3/2/2019 at the Toronto workshop

1. You want to lock the thigh. Movement comes from the lower part of the trunk.
2. Once you can do this, lock the front knee and the rear shoulder and open the kua. The movement of the kua may have an effect on the shoulder and knee, but they do not move. Movement comes from the kua.
3. Once you can do this, keep the front knee and the rear shoulder locked and close the kua. The movement of the kua may have an effect on the shoulder and knee, but they do not more. Movement comes from the kua.