Main: Production and sales: Clean Color Steel Plate, clean hand plate, clean rock wool plate, clean supporting products, building materials (except hazardous chemicals) , office supplies, hardware, electrical and mechanical equipment, chemical equipment; Technical Services for air purification; purification engineering; design, installation, commissioning and maintenance of Steel Structure Panel House Engineering; design and construction of mechanical and electrical equipment installation engineering; architectural decoration and fitment engineering; intelligent engineering design and construction; cold storage engineering; Design and construction of HVAC project (above seven items shall be operated by qualification certificate) ; Production and sales: Masks, protective clothing, goggles, disinfection products, forehead temperature gun, isolation clothing, medical equipment, meltblown cloth, non-woven cloth, clean clothing (the above items operating under license, specific items subject to the approval of the examination and approval department) , ordinary work clothes.（主营：生产及销售：净化彩钢板、净化手工板、净化岩棉板、净化配套产品、建筑材料（除危险化学品）、办公用品、五金交电、机电设备、化工设备；空气净化技术服务；净化工程，钢结构板房工程设计、安装、调试及维护，机电设备安装工程设计及施工，建筑装饰装修工程，智能化工程设计及施工，冷库工程，暖通工程的设计及施工（以上七项凭资质证经营）；生产及销售：口罩、防护服、护目镜、消毒产品、额温枪、隔离衣、医疗器械、熔喷布、无纺布、洁净服（以上项目凭许可证经营，具体项目以审批部门批准的为准）、普通工作服。）