(e) production and repair of air-conditioning equipment; production of gas-based equipment; construction and engineering services; construction and exchange of technology; transfer of technology; extension of technology; extension of technology; production and development of technology; production and distribution of materials; manufacture and distribution of materials; sale and distribution of equipment for the manufacture of new energy technologies; management of solid waste; sale of equipment for the protection of the environment; management of soil pollution and restoration services; sale of electrical equipment; management of water pollution; installation of new organic materials; management of air pollution; management of pollution of the environment; production and management of electrical equipment; installation of general machinery equipment; export and import of goods; export of technology; monitoring of the production and distribution of technology; manufacture and manufacture of materials for the manufacture and manufacture of materials for the manufacture and manufacture of metals; sale of equipment for the manufacture of new materials and equipment for the manufacture and repair of industrial machinery; construction and repair of industrial machinery; and production of and repair of chemical products; and maintenance of fisheries; (in addition to projects subject to legal authorization, activities are carried out autonomously and in accordance with the law, in accordance with a licence: construction works; construction works; interior decorating; construction professional work; sewage treatment and its reuse; subcontracting of construction services; and mining of mineral resources in non-coal mines. (a project subject to legal approval may only be carried out with the approval of the relevant department, subject to the approval documents or licences of the relevant department)