Production and sales of plastic profiles, building materials, aluminum materials, pipes, doors and windows, decorative materials, rubber and plastic products, and home appliance accessories; mining movable rescue cabins, refuge chambers, safety equipment, environmental protection equipment, dust-proof equipment, ventilation equipment, electrical equipment, washing machines Polyester equipment, mechanical and electrical maintenance equipment, instrumentation equipment, monitoring and control equipment, electronic equipment manufacturing; office supplies, sales; Class I and Class II medical equipment, medical equipment, rehabilitation equipment, labor protection supplies, civilian masks, medical masks, medical Production and sales of cotton swabs, medical gloves, protective clothing, forehead thermometers, medical dressings, and mask machines; professional contracting of building decoration and decoration projects, professional contracting of building curtain wall projects, design and construction of construction projects, landscaping projects, and decoration projects; construction labor subcontracting (excluding labor dispatch business); import and export trade (except for national restrictions or prohibitions); recycling of renewable resources (excluding solid waste, hazardous waste, scrapped cars, and other projects that require approval by relevant departments), utilization, development, and sales.