Feng Chengsu was a calligrapher in the Tang Dynasty. Zhenguan (627-649), a calligrapher in the palace, went directly to the Hong Wen Pavilion. In the 13th year of Zhenguan, Su Cheng wrote the book "On Music and Yi" and presented it to six people, including Wuji, Fang, Gao Shilian, Ran Junji, Wei Zhi and Yang Shidao. Moreover, the brushwork is exquisite and the rules are well prepared. Wang Xizhi's Preface to Lanting was handed down from ancient times, which is generally called Feng Chengsu's manuscript after Guo Tianxi in Yuan Dynasty. Breaking the front, breaking the pen, writing articles and posts are all fascinating.
Some calligraphers are good at copying, or because of the war, their works may not have been handed down.