System doors and windows are adopted by the system company as an overall door and window system solution, and make a clear commitment to product performance and quality indicators. Watertightness, airtightness, wind pressure resistance, mechanical strength, heat insulation, sound insulation, anti-theft, and sunshade need to be considered , weather resistance, operating feel and a series of important functions, but also consider the comprehensive results of the performance of each link of equipment, profiles, accessories, glass, viscose, and seals.