How to practice basic strokes in hard pen calligraphy?

The horizontal pen is low on the left and high on the right, and the pen should be strong and powerful, not too hard. Pull horizontally to the right and then press on the pen holder to take back the pen. Take back the pen gently and quickly. Pull it straight down, find the right length, press it slowly, and then slowly lift the pen off the paper to expose the front. The key point of the hanging needle is vertical, and the size of the head, middle and tail is proportional.