Yan and Liu gave me the impression that Yan's character is thick and round, and Liu's character is solemn and serious ... They both pay attention to the frame structure and the central stroke ... Song people used their regular script as the printing font, and the Songti characters in textbooks evolved from this, taking it as stable and neat. ...
Yan Gu, from the point of view of calligraphy, there are really not many similarities between them. Song characters were created by Qin Gui in Song Dynasty, and were selected as printed characters by later generations because of their neatness.