Baolong International Logistics and Trade Co.,Ltd.,established in 1995,located at zhengzhou,China.We have been manufacturing and supplying the highest quality and most dependable high pressure and economic sintered bauxite proppant for oil/gas field, Our ISO9001,OHSAS18000 and ISO14000 certified operation is part of a quality focus that has helped us gain the trust of many new oil/gas customers. And our on-time delivery and competitive pricing have made us integral partners in our customers' cost-reduction efforts.