During the Warring States Period from 3/KLOC to 0/6 BC, the State of Qin annexed Shu and established Shu County in Chengdu. In 256 BC, Li Bing, the prefect of Shu County, presided over the construction of the famous Dujiangyan water conservancy project. In the fifth year of Yuanfeng in the Western Han Dynasty (BC 106), Emperor Wu of the Han Dynasty established the National 13 State Secretariat and Yizhou Secretariat in Chengdu, with the jurisdiction roughly equivalent to the whole Sichuan Basin and Hanzhong area.
During the reign of Wang Mang, Gongsun Shu, the prefect of Shu County, rose up and occupied Yizhou, proclaimed himself emperor in Chengdu and took the word "marry" from Chengdu. Advocating white is the so-called "white emperor" in history. 12, Jianwu in the Eastern Han Dynasty, Yizhou was under the jurisdiction of the central government. After the Yellow turban insurrectionary uprising at the end of the Eastern Han Dynasty, Ada and Liu Zhang became independent in Sichuan and were later destroyed by Liu Bei.
In 265, Sichuan was ruled by the Western Jin Dynasty. In the early Jin Dynasty, Yizhou set aside a part to establish Liangzhou. At the end of the Western Jin Dynasty, during the Eight Kings Rebellion, Te Li led the rebel refugees into Yizhou and Liangzhou. Te Li's son, Li Xiong, proclaimed himself emperor in Chengdu, with the title "Dacheng". Later, Li Xiong's nephew Li Shou was renamed "Han" and was called "Cheng Han" in history. Dacheng was destroyed by the Eastern Jin Dynasty in 347.
58 1 was ruled by the Sui Dynasty. 6 18 After the establishment of the Tang Dynasty, it belonged to Jiannan Road, Shannan East Road and Shannan West Road. Yizhou rebuilt South Road and Liangzhou changed Shannan West Road. There are nearly 300 counties.
During the reign of the Song Dynasty in 965, Sichuan-Shaanxi Road was built in the Northern Song Dynasty. During the Xianping period of Song Zhenzong in the Northern Song Dynasty, Xia Chuan Road in the present Sichuan Basin was divided into four sections, namely Yizhou (now Chengdu) Road, Zizhou (now Santai) Road, Lizhou (now Guangyuan) Road and Kuizhou (now Fengjie) Road, which were collectively called "Xia Chuan No.4 Road" or "Sichuan Road", and Sichuan was named after it.