The postgraduate entrance examination of organic chemistry in Suzhou University takes analytical chemistry, physical chemistry or polymer chemistry. Organic chemistry, also known as carbon compound chemistry, is a very important branch of chemistry, which studies the composition, structure, properties, preparation methods and applications of organic compounds.

Carbon-containing compounds are called organic compounds because previous chemists thought that carbon-containing substances must be made from cattle. However, in 1828, German chemist Friedrich Weiler successfully synthesized urea in the laboratory for the first time. Since then, organic chemistry has broken away from the traditional definition and expanded to the chemistry of carbon-containing substances.