Tongzheng Mining Co.Ltd.,located in Shiqian County,Guizhou Province,is a modern professinal producer of ultrafine bariumsulfate. With advanced technologies and equipment imported from Germany,our company has strong technical strenths with an annual capacity of more than 150,000 tons of raw ore and more than 60,000 tons of ultrafine barium sulfate whose quality reaches or exceeds the advanced level of like products both at home and abroad. On the leverage of our own mine resources, we ensure the strict monitor from raw meterial to finished products and are committed to improve product develoment and production continually to provide hight quality and reliable products plus professional and comprehensive service for customers.