Suiling black pottery is a specialty of Heilongjiang, with exquisite craftsmanship and pure hand-making. They are sold in Harbin, and there is one at the intersection of Huayuan Street and Kuancheng Street. I don't know the rest. I have been to his house (yesterday), which is very close to mine. It seems that it hasn't been opened for a long time. I have his business card, the boss is Wang Wei, and he is also very nice. And Taobao. Search online, Suiling Black Pottery.