What is the opening of bean paste as a snack in Beijing?

This is a kind of cake called Toad Spitting Honey in Beijing. The opening shape of bean paste stuffing refers to toad spitting honey, also called bean paste sesame cake, which is a common variety of traditional cakes of Han nationality in Beijing. It is named because it is filled with bean paste. In the baking process, people call this kind of sesame seed cake toad spitting honey because there is a natural opening at the edge of the sesame seed cake to spit out the bean paste and hang it on the edge of the sesame seed cake.