What kind of copying is used in the development of calligraphy?

Watch the calligraphy teacher write calligraphy. What a beautiful word! Flowing clouds and flowing water are beautiful and pleasing to the eye.

Calligraphy is an artistic expression of the beauty of words. China's calligraphy is a unique traditional art of Chinese characters in China. Write it with its brushwork, structure and composition, making it a beautiful work of art, a silent poem and a dance without lines. There are pictures but no pictures.