Design and construction of outdoor shading projects; design and construction of awnings, awnings, car sheds, bicycle sheds, steel structures, membrane structures, and indoor and outdoor decoration projects; door-to-door installation and door-to-door maintenance of assembly line equipment, sandwich panels, and mechanical equipment; sales of awning products, canvas, tarpaulin products, tempered glass, aluminum alloy materials, stainless steel, aluminum alloy door and window products, hardware products, building materials, and tents.