Where can I buy old duck tongue cotton shoes in Shanghai?

Shanghai old duck tongue cotton shoes are sold on Qipu Road. Shanghai's old hat is characterized by flat top and beak, commonly known as duck beak hat. The brim of this hat ranges from two inches to four inches. This kind of hat was originally worn by hunters when hunting, so it is also called hunting hat. Because it is as flat as the brim of a duck tongue, it is called a cap.