Where is Cangzhou in the Tang Dynasty now?

Cangzhou got its name because it is close to the Bohai Sea. Parts of Cangzhou belonged to Youzhou and Yanzhou in ancient times, Qingzhou in the Western Zhou Dynasty, Yan, Qi, Jin, Zhao and other countries in the Spring and Autumn Period and Warring States Period, Julu County and Luobei County in the Qin Dynasty, Jizhou and Youzhou in the Han Dynasty, and the Three Kingdoms It belonged to the State of Wei at that time, and during the Southern and Northern Dynasties it belonged to Yingzhou and Jizhou of the Northern Wei Dynasty. In the second year of Xiping (517 AD), Emperor Xiaoming of the Northern Wei Dynasty, Cangzhou was established and administered three counties: Fuyang, Leling and Ande. Fuyang County was abolished in the early Sui Dynasty. Later it was divided into Hejian County, Bohai County and Pingyuan County. It belonged to Hebei Road in the first year of Zhenguan in the Tang Dynasty (627 AD), Hejian Mansion on Hebei East Road in the Song Dynasty, Hejian Road in Zhongshu Province in the Yuan Dynasty, and Beizhi Road in the Ming Dynasty. It is under the jurisdiction of the Hejian Prefecture of the province. In the Qing Dynasty, it was under the jurisdiction of the Hejian Prefecture of the Zhili Province. Some counties were under the jurisdiction of Tianjin Prefecture. In the early days of the Republic of China, it was under the jurisdiction of Bohai Road and Jinhaidao of the Zhili Province. In 1928, the provincial government system was abolished and renamed to Hebei Province. During the Anti-Japanese War, it was under the jurisdiction of the Jizhong and Jinnan Administrative Offices of the Shanxi-Chahar-Hebei Border Region of the People's Republic of China and the Shandong Bohai District Administrative Office. On August 1, 1949, the Hebei Provincial People's Government was established, with the Cangxian Prefecture, and the special agency was stationed in Cangxian Town, with jurisdiction over 11 counties. In June 1958, after Tianjin City was assigned to Hebei Province, Cangxian District merged with Tianjin District and was called Tianjin District, with the special agency stationed in Tianjin City. In September of the same year, Cangxian Town was renamed Cangzhou City (county level), and was subsequently merged into Cangxian County. . In early 1959, the Tianjin Prefecture was withdrawn and merged into Tianjin City. On June 1, 1961, the Cangzhou Prefecture was restored, and Cangzhou City (county level) was restored, with the special agency stationed in Cangzhou City. In December 1967, Cangzhou Prefecture was renamed Cangzhou Area. In December 1983, Cangzhou City was changed to a municipality directly under the Central Government of Hebei Province, and the administrative office and the municipal government were both located in Cangzhou City. In July 1993, the prefecture and city merged to form the current Cangzhou City, with the municipal government located in the Canal District.