Hard pen calligraphy writing, we must first understand the posture of holding the pen. There is a lot of pressure in this regard, but I realize that three points are very important. First of all, the pen tip should be basically vertical downward, and the pen should be lifted by wrist force instead of fingers. Second, while conforming to various pen-holding theories, it is to hold the pen in the posture when writing, and then draw a circle on the plane in the air. If the pen tip doesn't feel stuck by the joint when running at any angle, it means that your pen holding posture is correct. The third is that the finger is one inch away from the pen tip. Not too high.