The first palace of the Tang Dynasty is located in the county of Linyou, Shaanxi Province. It is called "Renshou Palace". It is the departure palace of Wendi. Tang Taizong Zhenguan has been restored and expanded for five years. It is renamed "Nine Major Palace". "Nine Major" means "Nine Heavy" or "Nine Floors". It is tall. Tang Gaozong once renamed "Vannian Palace". It means Yuan and Wanshou, and then restores the original name. Wei Zheng wrote and Ouyang inquired about the handbook "Jiucheng Palace Yiquan Ming", and set up a stone monument. This inscription has a great impact on the history of Chinese calligraphy.