Established in 1992, through dedication to quality and commitment to technology development, JOLONG Group has become the industry leader in precision manufacturing of high quality, double glazing energy efficient aluminum & UPVC window and door systems.Through 30 years of continuous growth, JOLONG Group has developed into one of the largest manufacturing bases with 60000 sqm industrial plant and production capacity of 350000 sqm of windows and doors, combining the best technician team, materials, automation machinery, industry design, installation and after sales services.