The regular script in the prosperous Tang Dynasty is represented by Yan Zhenqing's regular script. His regular script is simple and bold, dignified and muddy, showing an outward trend. The style of Yan-style calligraphy is different from that in the early Tang Dynasty, showing a sense of grandeur, boldness and fullness.
Yan Zhenqing (August 23, 79-784) was born in Jingzhao Wannian (now Xi 'an, Shaanxi) and his ancestral home was Langjia Linyi (now Linyi, Shandong). Famous officials and calligraphers in the Tang Dynasty.