Shanxi's three construction projects are stable. Shanxi Sanjian's formal employees have very good welfare benefits and are provincial state-owned enterprises, so they are relatively stable. The business scope of Shanxi Sanjian Group Co., Ltd. is: building engineering: building engineering, municipal public works, electromechanical engineering, highway engineering, steel structure engineering, foundation engineering, building decoration engineering, fire-fighting facilities engineering, waterproof, anticorrosion and thermal insulation engineering, airport rail engineering, building electromechanical installation engineering, water conservancy and hydropower engineering, metal door and window engineering, general contracting of building engineering, assembled building, urban infrastructure construction and operation, and engineering design (project management of building engineering design). Engineering consulting service. Landscaping project. Real estate development and management. Inspection (engineering quality inspection: engineering inspection and test. Inspection and testing: inspection and testing of building materials). Security technology prevention system: design, installation and operation. Road freight transport: road general freight transport. Steel structure processing and sales. Lease and maintenance of construction equipment. Building materials sales. Special equipment production: boiler installation, modification and maintenance.