Insurance mining, energy catering, hotel telecommunications, real estate service industry, clothing industry, non-profit organizations, advertising industry, aerospace chemistry, chemical health, medical care and construction industry education, computer metal smelting police training, firefighter accounting and beauty, physical media, publishing wood, paper retail, agricultural wholesale, tourism justice, lawyers, drivers, sports, academic research, performing arts, entertainment, medical services, art design, and so on. Generally speaking, industry classification is a detailed division of the organizational structure system of units or individuals engaged in national economic production and operation according to certain scientific basis, such as forestry, automobile industry, banking and so on.