黑龙江 (hēi lóng jiāng) Heilongjiang is China's northern-most province and borders Russian Siberia. It also shares a similar climate with Siberia and its freezing winters. It is most famous perhaps for the annual Harbin Ice Festival.
It is also goose central! Goose meat is widely available, both farmed and wiild. And their livers are used to make foie gras and these goose liver sausages. Actually, they are pork and goose liver sausages. They taste mild but I can definitely detect the liver without effort. Delicious.
These, I too have to buy on line. They cost me the equivalent of approx $7 USD / per pound. including delivery. They are one of my most frequent reorders. They are branded, but I'd be amazed if they are exported.