Tangshan Joyfident Energy-saving Technology Co.,Ltd was founded in 1992, which is a enterprise specialized in R&D and manufacturing of high-end energy-saving windows, doors, certain walls and sun rooms with more than 32 years experience. Our factory covers an area of more than 60000㎡ with more than 100 employees, all production equipment is imported from Germany, which guarantees the superior quality of Joyfident products.