It is one of the staple foods of the entire Tibetan people. It is rich in nutrients and convenient to carry. It is the best food for tourists in Tibetan areas. The water in Ganzi County has a long history. It is famous for its good materials, fine processing and delicious food. Authentic water scouring is only produced in Seishidi Township, Ganzi County, because the green sorghum that grows in the soil is processed by washing and scouring and then grinding with water mill. Water scouring is very particular about the selection of materials. It is a fine raw material, and the processing is very fine, because it is famous for its sweetness and deliciousness.