Hao Dangjia established the Sanctu Island Seafood Company in Weihai.

According to the Qichacha app, recently, Weihai Shandu Island Seafood Co., Ltd. was established, with Li Junfeng as the legal representative. Its business scope includes food sales and online food sales. Qichacha's equity penetration shows that the company is indirectly fully owned by Haodangjia.