Vertical often plays an auxiliary role, especially the middle vertical and long vertical should be straight and powerful, and the long vertical is divided into vertical and vertical. Generally, the pen is heavier, slightly lighter downward, and heavier. Hang the needle down with the trend, put the pen in front and keep it sharp. Only when the last stroke of a word is vertical can it be vertical with a hanging needle.
It's not completely vertical, and it's not easy to write vertically, just like when a person is standing, it's impossible to stand vertically all the time, as long as it's vertical. When you write, you should write boldly. Being too "serious" is counterproductive. And some vertical paintings, especially some short and vertical, should be written obliquely, such as "middle" and "five".