The secondary industry refers to mining, manufacturing, electricity, gas and water production and supply, and construction.

Tertiary industry refers to industries other than primary and secondary industries. The tertiary industry includes: transportation, warehousing and postal services, information transmission, computer services and software, wholesale and retail trade, accommodation and catering, finance, real estate, leasing and business services, scientific research, technical services and geological survey, water conservancy, environment and public **** facilities management, residential services and other services, education, health, social security and social welfare, culture, Sports and Recreation, Public **** Management and Social Organizations, International Organizations.

The primary industry appeared at the earliest in order to solve the problem of food and survival, but it was not named. The secondary industry to promote the development of the primary industry, but also the way of social development, expanding production capacity, improve the quality of survival, after solving the problem of food and clothing, we have more pursuit, such as culture, education, tourism, the environment, etc., accordingly, the tertiary industry also appeared. This is the need for social change and development is determined.