Interior decoration and renovation of residential buildings; construction labor subcontracting; construction engineering construction. General items: manufacturing of doors and windows; sales of metal matrix composites and ceramic matrix composites; sales of high-performance fibers and composite materials; sales of doors and windows; manufacturing of daily-use metal products; sales of optical glass; sales of daily-use glass products; sales of technical glass products; manufacturing of furniture; sales of plastic products; sales of sealing parts; sales of cork products; manufacturing of cork products; sales of forestry products; sales of rubber products; sales of sealing fillers; sales of flooring; manufacturing of flooring; manufacturing of sealing fillers; manufacturing of rubber products; manufacturing of sealing parts; manufacturing of sealing adhesives; sales of furniture; production of furniture parts; sales of furniture parts; furniture installation and repair services; sales of building materials; sales of decorative building materials; sales of mechanical equipment; leasing of mechanical equipment; sales of metal materials; retail of hardware products; wholesale of hardware products; sales of waterproofing membrane products; sales of coatings (excluding hazardous chemicals); road freight transport for ordinary trucks with a total mass of 4.5 tons or less (excluding online freight and hazardous goods); import and export of goods; import and export of technologies.