Licensed items: Residential interior decoration and renovation; construction engineering; construction engineering design (projects that require approval according to law can only be operated after approval by relevant departments, and specific business items are subject to the approval documents or licenses of relevant departments). General items: sales of building decoration materials; sales of lightweight building materials; sales of architectural ceramic products; sales of steel products for construction; sales of household goods; sales of furniture; furniture installation and maintenance services; sales of doors and windows; sales of daily-use glass products; sales of plastic products; retail of hardware products; sales of flooring; sales of metal products; sales of general merchandise; sales of metal materials; sales of metal structures; sales of electronic products; sales of lighting fixtures; sales of household appliances; building cleaning services; metal door and window engineering construction; landscape and gardening engineering construction; retail of daily-use home appliances; sales of household appliance parts; retail of kitchen and sanitary utensils and daily miscellaneous goods; sales of sanitary ceramic products; sales of metal tools; sales of tea sets; sales of gardening products; sales of bamboo products; professional design services; residential electrical and plumbing installation and maintenance services; internet sales (excluding items that require permission to sell); sales of building materials (excluding stone and river sand) (except for projects that require approval according to law, business activities may be conducted independently according to the business license).