Windows and sliding doors are key elements in modern architecture, it truly makes sense from both the functional and esthetic aspects. They function mainly in this way: They allow natural light to shine in; you can get ventilation from a flick of your wrist; and at the same time maintain your privacy secure from that prying eye next door. Echoed this point, Liu Ruoyu writes that technological advances have added new features to windows and sliding doors. These include energy conservation, sound insulation, long life and other less obvious achievements. The styles for windows are legion But all build on one foundation: the vertical line. Of windows, we call them double-hung here in America--where both sashes go up and down together; Ok, over varnished floors I never felt that ha moment arrive through Education City's 18-inch glass walls. In the summer, Northern China's weather is relatively hot and the windows must be opened so as not to suffocate from lack of air. It's rather difficult in these conditions for a foreigner like me too escape notice; but before long I had developed my own method Which could use 24 hours a day without meeting anyone else! Windows come in various styles--from double-hung to casement, while sliding doors create expansive openings that seamlessly blend indoor and outdoor spaces.The doors' applications range from residential homes to commercial buildings. They are adaptable for a variety of differing design needs and climatic conditions.