Taizhou is a city located at the middle of the East China Sea coast of Zhejiang province. It is located 300 km (190 mi) south of Shanghai and 230 km (140 mi) southeast of Hangzhou, the provincial capital. It is bordered by Ningbo to the north, Wenzhou to the south, and Shaoxing, Jinhua, and Lishui to west. In addition to the municipality itself, the prefecture-level city of Taizhou includes 3 districts, 3 county-level cities, and 3 counties. As of the 2020 census, its total population was 6,662,888 inhabitants whom 3,578,660 lived in the built-up area made of the three urban Districts and Wenling City now being largely conurbated.

Ningbo is a sub-provincial city in northeast Zhejiang province, People's Republic of China. It comprises six urban districts, two satellite county-level cities, and two rural counties, including several islands in Hangzhou Bay and the East China Sea. Ningbo is the southern economic center of the Yangtze Delta megalopolis. The port of Ningbo–Zhoushan, spread across several locations, is the world's busiest port by cargo tonnage and world's third-busiest container port since 2010.