What are the postures of calligraphy?

The posture of calligraphy must be upright, that is, the head is upright, the body is upright, and the hands are upright. The following are the essentials of sitting, standing and kneeling. The height of the desk and chair for sitting books should be moderate. Keep your head straight, but lean forward slightly, but don't lean sideways. Sit up straight with your hips and back straight. Keep your chest straight, don't lean over the desk, and your chest is 3-5 inches away from the table. Spread your legs naturally, put your feet flat, and press the paper with your left hand (the paper should also be put straight). The position of the pen should be about 6 inches from the nose. When standing a book, stand firmly with your feet and step slightly outward with your right foot in a "D" shape. Stretch your right half forward slightly, lean forward slightly, press the paper with your left hand, or spread it back. Predecessors advocated concentrating the strength of the lower body on the waist, pushing the shoulders with the strength of the waist, driving the upper limbs with the strength of the shoulders, and sending the strength to the pen tip through the upper limbs and wrists, that is, the so-called "strength comes from the waist and is rooted in the feet". Kneel on the book, kneel on the left knee, bend the right knee to support the body, and straighten the left hand to help the ground. But this method is too flexible to work. If possible, it is best to prepare a short case to write.