The book also burned the black jelly in the grass, just as its name is grass. Authentic Xiancao should be something similar to black bean jelly made from the powder of a plant called Cao Xian, and then slip it into milk tea. At the same time, this kind of grass is also a healthy Chinese medicine. Of course, there is another situation. On the internet, some people say that the black jelly inside is turtle ling paste, while others say that it is Cao Xianguo jelly.