Rushan City belongs to Weihai City, Shandong Province, and is named after Darushan in China. The cultivated species of Rushan Oyster is Pacific Oyster, mainly in raft culture mode, and the cultivated areas are distributed in the open waters of Rushan Mouth and Langnuankou.

Pacific Oyster is the main breed of Rushan Oyster, which adopts raft culture method. The culture areas are mainly distributed in the open waters from Rushankou in the west to Langnuankou in the east. In this water area, the tide is stable and the wind and waves are small. Rushan River and Huang Lei River bring a lot of nutrients and rich bait, which are very suitable for oyster raft culture.

Oysters in Rushan are usually called oysters. Bivalves, oysters. Shells are thick and hard with irregular shapes, such as approximate circle, triangle, rectangle and long shape. The lower shell (left shell) is large and concave, and other things are attached. The upper shell (right shell) is slightly small and flat, and the cover is like a cover. Oysters like to inhabit shallow seas and attach themselves to rocks or other attachments. Wild oysters abound on the rocks along Rushan coast, mostly pleated oysters and Dalian Bay oysters. The cultivation area, yield and quality of Rushan oyster rank first in China.