1. Oyster, also known as sea bream, oyster, etc. , an important mariculture variety in China, is widely distributed, and can be produced along the coast from Yalu River in the north to Hainan Island in the south. Among them, Qingdao Hongdao is one of the high-quality oyster producing areas. The oysters produced are big, fat and sweet, and they are delicious that Qingdao people cannot give up.

2. Because Hongdao Huanglan is located at the mouth of Dagu River, the seawater is low in salinity and rich in microorganisms, which is especially suitable for shellfish growth. Oysters and clams produced here are superior to other regions in taste and fullness, and were once the earliest seafood exported overseas by Hongdao. Generally, Qingdao oysters are listed one after another from June 5438 to February, and Tomb-Sweeping Day is the best fresh-keeping period for oysters. Among them, the most fertile time is around the Spring Festival.