Guangdong Hongze located in Guangdong province, is specialist in researching and manufacturing intelligent ventilation system, smoke and heat exhaust system, electric window opener, manual window opener and intelligent shade louver system.Guangdong Hongzehas a professional, young and skilled engineer and design team with strong and independent design and development ability. We integrating design, production and sales into a whole. With 15 years of experience in development, production and sales of window openers, the product quality is stable and the design style is unique. Our company has strong technical force to provide the perfect solutions for all customers. The professional ...