Now I can't see Wang Xizhi's original work. Some of the works called Wang Xizhi that we saw were all copied after the Tang Dynasty. However, these Tang Dynasty replicas are also rare treasures, and Long Ting is one of them. This Preface to Lanting Collection is called "Dragon Book" because it has a small seal in front of it about the number of years of Tang Zhongzong Li Xian Dragon. It is said that it was copied by Feng Chengsu, a calligrapher in the period of Emperor Taizong. Legend has it that Emperor Taizong sent someone to get the manuscript of Preface to Lanting by almost fraudulent means, and regarded it as a treasure, and ordered a good calligrapher in the DPRK to copy and expand several copies and give them to princes and ministers. Finally, Emperor Taizong, who deeply loved Xizhi's calligraphy, brought the original to Zhaoling, leaving endless regrets for future generations. ?