According to the inquiry in official website, JD.COM, the first-line brand has been adhering to the brand concept of "Nine Kings for All * * *" since its establishment in 2006, and has been a comprehensive modern door and window manufacturing and service enterprise integrating high-end personal tailor entrance doors, high-end aluminum alloy doors and windows, anti-theft security doors, non-standard villa doors, fire doors and windows, smart locks and other door and window products. Jiuhuang Doors and Windows have been rated as "Top Ten Brands of Security Door in China" and "Top Ten Brands of Aluminum Doors and Windows in China" for many years. Nearly 20 million families in China have chosen Jiuhuang, and they have won more than 100 honors and patents in the past ten years. So it belongs to the first-line brand.