What calligraphers and calligraphy characteristics are there?

1. Yan Zhenqing: The face is square, simple, plump and vigorous, in short, grand.

2. Ouyang Xun: There is an upward-right tendency, the overall layout is dangerous, the font is long, and the strokes are strong and powerful, as if "cut from all sides."

3. Liu Gongquan: Liu’s body is balanced, lean and hard, his stipples are sharp and straight, and his bones are strong.

4. Zhao Mengfu: Zhao is upright, handsome, tactful and mellow, and extremely practical.