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A focused speciality silica and related materials producer and products sales company in mainland China. The Sino Surplus International Limited is the leading producer and sales company of silica/crystal materials and related products. Backed by the Ministry of Geology& Mineral Resources of China and sharing the most up to date lab facilities and research resources of the Chinese Academy of Geological Sciences enabled the Sino Surplus International Limited a first class company in producing quality silica materials as well as the most reliable sales company in China.