Seafood market. Tailai refers to Tailai County. Tailai County is a county under the jurisdiction of Qiqihar City, Heilongjiang Province. Wholesale seafood products, especially hairy crabs, are the cheapest in the seafood market in Tailai County, nearly half cheaper than those in the store. Eriocheirsinensis (scientific name: Eriocheir sinensis) is a crustacean belonging to the genus Eriocheir, also known as river crab and hairy crab, which is a traditional aquatic treasure in China.