Yezhang can be called 'tucking palm', or 'inserting palm' in English. It has the feeling of tucking something away into an inner jacket pocket, except perhaps that the jacket is on your opponent. The strike is low, going into the floating ribs, kidneys or hip crease. The striking arm coils to place the palm out and then applies the power straight. The assisting arm can either be raised in a high block or settle behind.
Power release drills
Partner training drills
Sparring drills