Beijing Daxing Xisilai Mansion, located in Daxing District, Beijing, is the center of the Daxing Area. Surround by the crowd and noise, this apartment requires better light, ventilation and less noise. Luckily Warren’s classic 75 system window boasts its thinner frame, allowing more natural light to shine into the room. Its triple glasses and three-layer weather stripping reduce noise and guarantee the room warmer in winter and cooler in summer as well. Conceal drainage system prevents insects, wind noise, and accumulated mud. This window system solves all the potential problems that the apartment might meet.