I have never eaten it. Just hearing the name, I thought it was a specialty of Guangdong. Because of the poria paste, I checked online and found out that it was wrong. It turned out to be a specialty of Beijing. Poria cocos cake, also known as Poria cocos sandwich cake, is a nutritious traditional Han snack produced in Beijing.

Because the skin is as thin as paper and the color is snow-white, it is very similar to the cloud Fuling slices in traditional Chinese medicine, so it is called "Poria Cake"

Poria Cake