Warren is a brand of Beijing Warren doors and windows Co., Ltd. It is a comprehensive modern enterprise integrating R & D, production and marketing, focusing on the retail of doors and windows for more than ten years. It has 60000 square meters of standardized production and storage base in Linqu, Shandong and Fangshan, Beijing, with an annual production and sales of more than 350000 square meters of doors and windows. Brand flagship stores have been set up in more than 100 cities across the country, providing a total of 350000 families with integrated door and window solutions.The company intervenes in the market with energy-saving system doors and windows, and adheres to the business philosophy of technology leading, quality assurance and service winning.