Pharmaceutical intermediates:

　　The intermediate is the precursor of the raw material drug and is the product of each stage before the raw material drug is made. In fact, it is some chemical raw materials or chemical products used in the process of drug synthesis. This kind of chemical product does not require a drug production license, and can be produced in ordinary chemical factories. As long as it reaches a certain level, it can be used in the synthesis of drugs.

　　API:

　　Refers to raw materials used in the production of various preparations, which are active ingredients in preparations, various powders, crystals, extracts, etc. used for medicinal purposes prepared by chemical synthesis, plant extraction or biotechnology, but patients cannot Substances that are taken directly can only be used clinically if they are processed into pharmaceutical preparations. The synthesis of drugs is more stringent than that of general chemical factories, so pharmaceutical factories need GMP certification.