Enteric capsules are, in layman’s terms, capsules that are only dissolved and absorbed in the human small intestine. The so-called enteric capsules are actually made by adding special pharmaceutical polymer materials to the balloon sheath or by special treatment so that they do not dissolve in the gastric juice but only disintegrate and melt in the intestinal fluid. Enteric capsules need to meet alkaline liquid in the intestine before they melt, while stomach acid is acidic, so the capsules will not be melted in the stomach. If the enteric capsule melts in the stomach, it will instead cause damage to the stomach. The capsules commonly used in clinical practice are gelatin capsules, which are composed of gelatin. Medicinal gelatin is a high-grade capsule made from the skin, bones and tendons of animals through a complex physical and chemical process, with physical characteristics such as high viscosity, high power and desirability of freezing.