Writing calligraphy has certain requirements for wrists and arms, and it needs to be tempered to write better. For example, when writing big characters on the wrist, it feels very clear, and many strokes are difficult to write well without an auxiliary hand. When writing small print, use the strength of your wrist to write every stroke smoothly. If you want to write more than three inches, it is difficult to write by your wrist alone. Because the wrist can't balance strength and speed.