Yan Zhenqing's calligraphy claims to be

Yan Zhenqing (709-784, Yi Shuo 709-785), born in Wannian, Tang Jingzhao (now Xi, Shaanxi), was a calligrapher in the Tang Dynasty in China. An outstanding calligrapher in the middle Tang Dynasty. His "Yan Ti" regular script, together with Zhao Mengfu, Liu Gongquan and Ou Yangxun, is also called "the four masters of regular script". Also known as "strict care" with Liu Gongquan.