Black herring is mainly produced in the northeast. According to the information about herring, the reason why herring is sold only in the northeast is that herring is mainly produced in the northeast. The common "big herring" in the three northeastern provinces is not big herring, but herring, which is a kind of marine fish. Black herring is thick and tender, delicious, contains human fat, and has large thorns but few, so it is a good fish.