the wrist and palm are bent back, and the fingers are opposite to the chest, so it is called. He Shaoji used this method in writing in Qing Dynasty. When he was writing, his wrist hung high, and he could lift and press, but he couldn't fall from left to right, which was contrary to the physiological function of ordinary people. China's calligraphy was extensive and profound, and Shen Yinmo, a modern calligraphy master, commented that calligraphy was "colorless but brilliant with pictures, silent but harmonious with music". As an elegant art, calligraphy made people fascinated by her unique calligraphy beauty. Learning calligraphy, these calligraphy terms must be known! People gathered under the door of the pen family. An analysis of the advantages and limitations of pen calligraphy writing: natural selection, prosperity and adversity, pen shows many advantages: it eliminates the trouble of frequent dipping in ink, fills up the ink at one time, and the number of words that can be written is unknown.