People who live and work in Shenzhen without Shenzhen area or Shenzhen hukou (that is, traditional Shenzhen people). 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. Shenzhen is located in South China of China, south of Guangdong, east of Pearl River Estuary, east of Daya Bay and Mirs Bay, west of Pearl River Estuary and Lingdingyang, and south of Hong Kong. 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, an international science and technology industry innovation center and one of the three national financial centers in China. It is fully committed to building a pioneering demonstration zone in Socialism with Chinese characteristics, a comprehensive national science center and a global ocean centre city. Shenzhen is a port city with the largest number of ports, the largest number of entry-exit personnel and the largest traffic flow in China.