Quzhou Zunlong Trading Co.,ltd was confirmed by Ministry of Commerce of the People's Republic of China.We are cooperation with bigger manufacturer of crystal materials for long time.Also, we are a manufacturer of security screen doors&windows from Zhejiang procince ,china.Products quality is leader in Southeast Asia. We professional sales security doors&windows,rough synthetic corundum and spinel, natural raw anhydrite gypsum and gypsun powder,building materials,LED substrate and so on.We are exported to India, South Korea, Pakistan, Japan, the United States, France, Egypt, etc.