Liu Gongquan used a pen and a Fiona Fang. Dotting is angular, right?

That's right. "Calligraphy view" holds that Liu Gongquan's brushwork and Fiona Fang's stippling are the evaluation of Liu Gongquan's regular script characteristics, while Liu Gongquan's calligraphy characteristics are mainly his regular script works, and brushwork is one of its remarkable characteristics. In Liu Gongquan's calligraphy, the combination of Fang Bi and round pen makes stippling angular and gives people a strong feeling, which is one of the important reasons why Liu Gongquan's calligraphy is known as Liu Gu. Liu Gongquan, named Hang Cheng, was an official, calligrapher and poet in the middle Tang Dynasty. He is another famous calligrapher after Yan Zhenqing. He is famous for his regular script, and he is as famous as Yan Zhenqing and Yan Liu.