Shanghai (Shanghai and Shenzhen for short) is the national central city of China, the core city of Shanghai-Hangzhou-Ningbo, the innovation center of international economy, finance, trade, shipping and science and technology [1][2], and the first batch of coastal open cities. Located at the mouth of the Yangtze River, Shanghai is the leading city in the Yangtze River Economic Belt, facing Kyushu Island across the sea, Hangzhou Bay in the south and Jiangsu and Zhejiang provinces in the northwest. [3]

Shanghai Port ranks first in the world in terms of cargo throughput and container throughput. It is an international river and sea port and has the first free trade zone in Chinese mainland-China (Shanghai) Pilot Free Trade Zone. Shanghai, Anhui, Jiangsu and Zhejiang are isomorphic to form the Yangtze River Delta urban agglomeration.

Shanghai belonged to the State of Wu in the Spring and Autumn Period [8]. During the Warring States Period, it belonged to Yue State and Chu State successively, and was once the fief of Shen Jun and Huang Xie of Chu State, so it was nicknamed "Shen". In the Jin Dynasty, because fishermen created a fishing tool "Hu", the place where the river flowed into the sea was called "Hu", so the lower reaches of Songjiang were called "Hu", and later it was changed to "Hu", so Shanghai was called "Shanghai" for short. In the third year of Xianchun in the Southern Song Dynasty (A.D. 1267), a town named "Shanghai Town" was set up in Puxi, Shanghai. In the 29th year of Yuan Dynasty (AD 1292), the central government set aside Shanghai Town from Huating County and approved the establishment of Shanghai County, marking the beginning of the establishment of Shanghai.