I have a friend, a penholder, who does not speak English well (he is a visitor from China). When we practice, he tends to do the spinny "block" with his wrist brushing over the ball a bit (he plays RPB). I struggle to explain to him how to block flat. I am pretty sure there should be some tutorial in Chinese on how to properly flat block in practice with RPB that I can forward him. So please post one if you know.