The head can't be biased, and the words are not correct; Shoulder level should not be tilted, and the lumbar spine will be tilted, which will affect physical development; When straight, the upper body stands upright and the writing style is imposing; Flat feet are a stable body. One foot means that my eyes are one foot away from the paper, one inch means that my fingertips are one inch away from the pen tip, and one punch means that I sit up straight with my chest out, and my chest is one punch away from the desk.
This is a general requirement, easy to remember and master, and also a more suitable writing posture.
When you raise a pen, you should mean empty hands, that is, your fingers must be solid and your palms must be empty, so that you can write flexibly.