Black Glazed Porcelain GONG DAO BEI (FAIRNESS JUG)Clay type: Jingdezhen high firing coarse grained clay Artist: Shui Tao Craft: Fully handmade Capacity: 400ml Width: 7. 00cm Height: 8. 50cm Gong Dao Bei or fairness jug, is an essential part of gong fu tea preparing that serves to control the strength of the brew. After brewing the tea for a certain amount of time either in a very small teapot such as Yixing Chaozhou teapot or in a Gaiwan, the tea liquor should be decanted completely into a Gong Dao