The construction industry refers to the material production department engaged in the survey, design, construction and maintenance of the original buildings in the national economy. According to the classification catalogue of national economy, the construction industry, as one of the thirteen branches of the national economy, is composed of the following three categories: civil engineering construction industry; line, pipeline and equipment installation industry; survey and design industry. The main function of the construction industry is to carry out construction and installation activities for various building materials and components, machinery and equipment, and to build productive and non productive fixed assets for the national economy. The development of construction industry is closely related to the scale of fixed assets investment, which promotes and restricts each other.
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