According to enterprise data, Chengde Sanhe Construction and Installation Engineering Co., Ltd. was established on April 3, 2006, and its business scope includes housing construction projects; Municipal engineering; Highway engineering; Water conservancy project; Electric power engineering; Foundation and foundation engineering; Earthwork; Landscaping project; Landscape engineering; Steel structure engineering; Lighting engineering; Communication engineering; Safety engineering; Environmental protection projects; Intelligent building engineering; Architectural decoration engineering; Indoor and outdoor decoration works; External wall thermal insulation project; Waterproof works; Anti-corrosion and thermal insulation engineering; Building curtain wall project; Hydropower warm installation project; Construction and installation works (except special equipment); Ecological protection project; Environmental governance projects; River and lake regulation project; Dike project; Sports facilities engineering; Demolition of buildings (excluding blasting demolition); Engineering cost consultation; Construction engineering labor subcontracting; Property management; Property services; Installation and maintenance of mechanical equipment, electromechanical equipment (except special equipment) and installation of refrigeration equipment; Land remediation services; Install lifting equipment; Boiler installation, maintenance, pressure pipeline installation, second-class motor vehicle maintenance; Manufacture and installation of pressure vessels, environmental protection products, dust collectors, mechanical non-standard parts, mechanical parts and automobile non-standard parts; Wholesale and retail of building materials (excluding dangerous drugs), motor vehicle parts, lubricating oil, rubber products, industrial boilers, boiler accessories, steel and plumbing parts; Technical consultation; Rental of houses, construction machinery and equipment and venues (projects that must be approved according to law can only be operated after approval by relevant departments).