There is still a difference between the cakes in the old Tongguan Chinese hamburger and the cakes in the Chinese hamburger. The specific production can be found in Guanxiangxing snacks, and the teaching will start with making cakes, pancakes and bacon gravy. Every student who comes to study can master the whole production process and practice it repeatedly during the study period, until the food tastes the same as that taught by the master before graduation.