The characteristics of Yan Zhenqing's calligraphy:
The most outstanding contribution of Yan Zhenqing's regular script is the central pen. Since Wei and Jin Dynasties, Yan Jie changed his previous biased writing. No matter where he starts and turns to collect the pen, he hides the front head in it, making it look like a swallow's tail, strong and tenacious, full and natural. Yan Kai's brushwork is horizontal and thin, vertical and strong, thin but not thin and powerful, strong but not thick but macro.
In Yan Zhenqing's regular script in his later years, the strokes are often reversed, in other words, the strokes are subtle, heavy and full of power. In Bei's works, Yan Zhenqing's hidden pen style and brushwork make him graceful and reserved, and show Yan Zhenqing's personality charm through his lines. Not sharp-edged, cautious.