What font was used in the Tang Dynasty?

In Qin Dynasty, Xiao Zhuan was designated as the official font, but it was very troublesome to write Xiao Zhuan, so officials in Qin and Han Dynasties mainly wrote official scripts, but in Tang Dynasty, regular script was the official font, so there should be more running scripts in daily life. In fact, the running script originated very early, and Wang Xizhi's Preface to Lanting is called the best running script in the world. The establishment of the Tang Dynasty ended nearly 300 years of turmoil since the Western Jin Dynasty. The culture of the Tang Dynasty was profound and brilliant, reaching the peak of China's feudal culture. It can be said that "books flourished in the early Tang Dynasty." There were more ink marks in the Tang Dynasty than in the previous generation, and a large number of inscriptions left valuable calligraphy works. Yan Bei () Liu Gongquan Mysterious Pagoda Monument (Liu Kai) Jiuchenggong Li Quanming () Zhang Xu Abdominal Pain Post (cursive script) Huai Su Autobiography Post (Crazy Grass) Chu Suiliang Yanta Sage Teaching Preface (regular script)