Northeast China region as a wooden chimney. Ching Yuen Kwai students "the other Hakka tea" Volume 13: "Hulan, who because of wood into space, cut open to direct, cut into solitary pillar, tree canopies, the lead kang smoke out of. Overlying Jing baskets, and empty the next orifices to the smoke, rain and snow can not enter. than households alike. " |