Aluminium sliding door has been popular for many years. The combination of the door frame (optional style) + transparent glass, combined with wider door opening, is popular in recent years. In particular, it is used for indoor partition, which does not affect the lighting, to create a semi-open space and does not occupy space. Why are aluminium sliding doors so popular? https://www.cnwindowsdoors.com/a...ding-doors-for-sale.html