Intermediates refer to semi-finished products, which are intermediate products in the production of some products. For example, if you want to produce a product, you can produce it from the intermediate to save cost. Pharmaceutical production needs a large number of special chemicals, most of which were produced by the pharmaceutical industry itself. However, with the deepening of social division of labor and the progress of production technology, the pharmaceutical industry has transferred some pharmaceutical intermediates to chemical enterprises for production. Pharmaceutical intermediates are fine chemical products. The production of pharmaceutical intermediates has become a major industry in the international chemical industry.