Commerce means: engaging in economic activities such as selling, buying and selling, wholesaling, retailing, foreign trade, domestic commerce, and voluntarily exchanging goods or services.

The service industry can be divided into four levels: the first level is the circulation sector, including transportation, post and telecommunications, commercial catering, supply and marketing of materials and warehousing; the second level is for the production and living services, including the financial industry, insurance, public utilities, residential services, tourism, consulting and information services and various types of technical services, etc.; the third level is to improve the level of science and culture and the quality of service sectors, including education, education, information and services, etc.; the third level is to improve the level of science and culture and the quality of service sectors, including education, education, information and services. The third level is to improve the scientific and cultural level and the quality of the residents of the sector, including education, culture, radio and television business, scientific research, life and welfare services, etc.; the fourth level is to serve the needs of the social public **** sector, including the state organs, social organizations, as well as the army and the police and so on.

And China's business services industry, refers to the main business sector has long been managed by the business sector, and business and trade activities and people's lives are closely related to the wholesale, retail, accommodation, catering, leasing, business services, residential services, as well as logistics, pawnbrokers, auctioneers, and part of the entertainment industry and other service industries.