Cangzhou is a prefecture-level city in China forming the southeastern extension of Hebei Province to the coast of the Bohai Sea between Tianjin and Shandong. At the 2020 census, Cangzhou's built-up area made of Yunhe district, Xinhua district, and Cang County is largely conurbated with a population of 1,421,843 inhabitants, while the prefecture-level administrative unit in total has a population o…