Specialized in quartz purifying and miniaturization, Hanhua Si Industry Ltd. devote ourselves years for the relevant scientific research laboratory. Made technological breakthrough, were accumulated numerous valuable data large-scale production our ...

Tianjin Yandong Mining Co., Ltd. has 32 years of experience in research, sales, warehouse and transport on mineral products. We are located which is a good area that only 50km from Xingang Port. Our products dominate the north China export to more than 20 ...