The first regular script in the Tang Dynasty is the inscription of Liquan in Jiuchenggong, and the tablet is called the first official book in China of Graphite Seal Carving by Han. "Official script" is "regular script". Jiuchenggong Liquan inscription is an inscription in the Tang Dynasty, which was carved in Linyou (now linyou county, Baoji, Shaanxi) in 632 AD. Wei Zhi wrote, Ou Yangxun wrote. Describe that Emperor Taizong discovered Liquan during his summer vacation in Jiucheng Palace. The brushwork is vigorous and graceful, and there is also proper limit. It is the ideological work of Ou Yangxun in his later years, and it has been highly praised by scholars.
Ou Yangxun in Tang Dynasty: Regular script is rigorous and precipitous, and is known as "the first regular script in Tang Dynasty". His representative works include Jiuchenggong Liquan Inscription and Huangfushengchen Inscription.