It was once reported that the treats became popular during the Yuan dynasty when the cakes were reportedly used as paywall, essentially a vessel to deliver secret notes to assist Han Chinese in overthrowing the Mongolian rulers at the time.
史载元朝时期,
饼承担起了载体的作用,当时人们利用
饼传递起义密信,帮助汉人推翻了蒙古的统治。