Window Dragon is a brand of Shanghai Dinggu Door Window Seal Materials Co., Ltd.Shanghai Dinggu Door Window Secret Materials Co., Ltd. was established in June 2011 in Shanghai, with a registered capital of 500,000 yuan. It is a large domestic high -end door and window accessories wholesaler.EssenceIt has continuously invested new funds to develop new products, and has obtained multiple national patents.There is a place in the fierce market competition.