yijia has a good door and window system. Yijia Doors and Windows is an enterprise specializing in R&D, production and sales of door and window systems. It was established in 1996 and is headquartered in Foshan City, Guangdong Province, China. Yijia doors and windows has a professional R&D team and efficient production line, and is committed to providing high-quality, environmentally friendly and energy-saving door and window system products and services. Yijia doors and windows products cover aluminum alloy doors and windows, sun rooms, sliding doors, horizontal doors, broken aluminum doors and windows, security window, soundproof windows and other series, and the colors, models and sizes of products can be customized according to customers' needs. The product quality of Yijia doors and windows has been widely recognized, and has passed ISO91 international quality management system certification, ISO141 environmental management system certification, OHSAS181 occupational health and safety management system certification and many other certifications. Yijia doors and windows also pay attention to R&D and innovation, and constantly introduce new products that meet market demand. The company has a number of patented technologies and software copyrights, and has won many honors, such as "China Famous Trademark", "Top Ten Brand of Building Aluminum Profile in China" and "Top Ten Enterprise of Building Aluminum Profile Industry in China". Generally speaking, Yijia Door and Window System is a trustworthy door and window system enterprise with reliable product quality, leading technology and excellent service.