It is rich in Dalian, so the accent of Dalian people is also called "oyster flavor". Oysters in Shandong are mainly cultured. According to the county records of Chenghai, a famous oyster breeding place in history, there are oyster houses here. The oysters are white and the pickled oysters are yellow, which is delicious. In the west, oysters were once called the milk of the sea, and in the Bible, oysters were praised as the power of the sea. Li Bai, a poet of the Tang Dynasty in China, wrote an inscription that oysters are the only thing in the world. Li Henian, the governor of Fujian in Qing Dynasty, once wrote a poem praising this day: the oyster house tastes better than Jiang Yao. It can be seen that oysters are equally popular in China and the West. Oyster meat is delicious and nutritious. It is a treasure on people's table and is deeply loved by people. According to the food nutrition test, oysters contain more than 50% protein, but only 7%-8% fat, and contain a variety of trace elements and vitamins. Because it looks like milk after cooking, it is called submarine milk. Children, pregnant women and lactating women can contribute to the growth of bones and teeth, and can effectively prevent rickets in children.

Oyster is a kind of shellfish. Its meat is plump, smooth and nutritious, and it is known as "undersea milk". The dried oyster meat contains 45% ~ 57% protein, 7% ~ 1 1% fat and 0/9% ~ 38% glycogen. In addition, it also contains a variety of vitamins and taurine as well as nutrients such as calcium, phosphorus, iron and zinc. A large number of wild oysters grow along the coast of China. Every time the sea ebbs, oysters will emerge from the sea. There are cultured oysters in Weihai, and fresh oysters are on the market all year round. Tomb-Sweeping Day has the richest oyster meat. Wendeng's Mulberry, named after Mulberry Island, is the best among rare oysters in Jiaodong sea area, and it was a tribute as early as the Song Dynasty. According to the Guangxu edition of Wendeng County Records, Mulberry is "clear and delicious". Hao Yixing, a scholar in the Qing Dynasty, said in "The Sea Fog": "People who came out of Wendeng Haisang Island (referring to mulberry oysters) have a unique taste and are precious far and near." Mulberry Island is also rich in rolling oysters. This kind of oyster shell has no stone, so it drifts with the current, and fishermen can pick it up after the low tide. Ancient Wendeng people had the habit of cooking oysters on the spot, which kept the original flavor of oysters. This custom has been inherited to this day. Crashed oysters are the traditional dishes of coastal residents in China. In 2008, Rushan Oyster was registered as a geographical indication trademark by the Trademark Office of the State Administration for Industry and Commerce.