potherb, pickled cabbage, potherb mustard and bean stuffing. Wuqing district's Zhailao Wanjia Lamp Shop is famous for its vegetable dumplings, which are made of corn flour and common flour, with potherb, sauerkraut, potherb mustard and bean stuffing. Wuqing district is affiliated to Tianjin. Located in the northwest of Tianjin, the middle and lower reaches of Haihe River system.