Hard capsules: It is made by filling solid medicines in empty hard capsules. The hard capsule is cylindrical and is formed by tightly fitting two matching upper and lower sections. The size is indicated by a number and can be selected according to the size of the drug dose. Soft capsules: also known as capsules. It is a round or oval preparation formed by sealing oils or liquid medicines or suspensions that have no dissolving effect on gelatin and other capsule materials in soft capsules. However, due to different preparation methods, it can be divided into two types: those made by pressing method often have pressure seams in the middle, so they are called seamed capsules;It is made by the dripping method and is spherical and seamless, which is called seamless pellets.