Oysters produce a lot. Shenzhen is a coastal city, near the sea. Oysters produce a lot and are relatively cheap. Shenzhen is a prefecture-level city, a city with separate plans, a megacity, a special economic zone and a national innovative city approved by the State Council, and it is one of the core engine cities in Guangdong-Hong Kong-Macao Greater Bay Area. By the end of 2022, the city had jurisdiction over 9 districts with a total area of 1997.47 square kilometers and a permanent population of 176 1800.