Liaoshen refers to the sea cucumber growing in the coastal waters around Dalian. As far as Dalian is concerned, the best one should be the sea cucumber from four islands in Changhai County. Natural geographical location and climate are the golden locations for the growth of sea cucumbers.

The sea cucumber in Long Island, Shandong Province belongs to the sea cucumber in Bohai Strait. Its place is close to Tieshan Waterway, and there are many ships and islands and reefs, so it has a large flow and poor water quality. It can't be compared with the sea cucumber in Dalian Changhai.