Shenzhen, referred to as Pengcheng for short, is a sub-provincial city, a city under separate state planning, a megacity in Guangdong Province, a China Special Economic Zone approved by the State Council, a national economic center city and an international city [1]. By the end of 20 19, the total area of nine districts in the city was 1997.47 square kilometers, the built-up area was 927.96 square kilometers, and the resident population was 13438800, an increase of 4 12200 over the end of last year. Among them, the permanent registered population is 4.9478 million, and the permanent non-registered population is 84.965438+10,000.

Shenzhen is located in the south of China, in the south of Guangdong, on the east bank of the Pearl River Estuary, with Daya Bay and Dapeng Bay in the east, the Pearl River Estuary and Lingdingyang in the west, and Hong Kong across the Shenzhen River in the south. It is one of the four central cities in Guangdong-Hong Kong-Macao Greater Bay Area, a national logistics hub, an international comprehensive transportation hub [8], an international science and technology industry innovation center and one of the three national financial centers in China. Make every effort to build a pioneering demonstration zone in Socialism with Chinese characteristics, a comprehensive national science center and a global ocean centre city.