4 Introduction to the rise and prosperity of donkey-hide gelatin: Donkey-hide gelatin is a specialty product of donkey-hide gelatin. It was paid as tribute as early as the Sui and Tang Dynasties. In ancient times, donkey-hide gelatin was a precious Chinese medicinal material. At that time, only precious people could use it. Empress Dowager Cixi suffered from hemorrhage when she was young, and she recovered after taking donkey-hide gelatin as a tribute from Dong'e.