Ejiao, or donkey-hide gelatin, was first recorded in "Shen Nong Ben Cao Jing Shu", which was compiled by people living during the Qin and Han dynasties in the name of Shen Nong, the legendary farmer's god and the first herbalist. Ejiao, which Li Shizhen, a traditional Chinese medicine expert, referred to as a "holy medicine" long ago, originally gained popularity …
