Liu Gongquan, Jing Ren, was a famous calligrapher in Tang Dynasty. His calligraphy was first learned from Wang Xizhi, and then from Yan Zhenqing and Ou Yangxun, forming a Liu style that was good at strengthening bones. Liu Gongquan is famous for his regular script. Later generations called Liu Gongquan and Yan Zhenqing "Yan Liu", and his works also had the reputation of "Yan Liu Jin Gu".