Interesting calligraphy

1. Is really a real book, or an official book, that is, regular script; Grass, official script and seal script refer to grass script, official script and seal script respectively.

2. Liu, I'm afraid it's "Liu", misspelled as Liu. Because there is also the expression "Yan Liu Ou Su", which refers to the calligraphers Yan Zhenqing, Liu Gongquan, Ou Yangxun in the Tang Dynasty and Su Dongpo in the Song Dynasty, all of whom are representative regular script writers, and the expression "Yan Liu Ou Su" has never been heard of, so it is extremely uncoordinated to gather together a Liu Yong or something.

3. "Two Kings" refer to Wang Xizhi and Wang Xianzhi, who have made outstanding contributions in the history of calligraphy in China and become respected masters by future generations. "Inheriting the two kings" means inheriting the charm, statutes, skills and demeanor of the two kings.