Founded in 1998, Beijing Zhong Cheng Quartz Glass Co., Ltd. (ZCQ for short) represents a high-tech supplier manufacturing quartz, optical glass, crystal glass products and molding tools located in Changping District, Beijing, China. Our main customers are from overseas countries and mainland China. ZCQ's products are widely in the lines of semiconductors, electronics, coating, laser, chemicals, medical treatment, spaceflight, optical resources, laboratory research, mechanical equipment and ...