Daru mountain breeding ground. According to the relevant information of Rushan oysters, authentic Rushan oysters are the cheapest. In the coastal areas from the north of Jiangsu and Zhejiang to the Bohai Sea, people call it oyster or oyster; in the coastal areas of China, Fujian and Taiwan Province Province, people call it oyster; in the South China Sea waters such as Guangdong, Guangxi and Hainan, people call it oyster.