Longstone, registered in Tianjin Development Zone,  headquartered in Beijing, is a leading supplier of raw materials in China. Based on the importing and exporting business framework concerning products like metallurgy and minerals, and welding materials which have been operated by Sunstone International since its foundation in 1998, Longstone has keeping forging ahead with developing new products and exploring new markets in the fields of metallurgy, refractory, welding consumables, chemical industry and building materials industry, etc.. And guided by the national policies, we have established our own culture: people foremost and with bold innovation; and also the strategic idea of market-oriented and customer focus. Meanwhile, we established, in succession, representative offices in Mid-east, and long-term strategic cooperation relationship with Korea, the Netherlands, the United States, Turkey, and India. Up till now, the company’s international business has covered more than 20 countries or regions.

The international business of Longstone has been oriented in welding flux materials, metallurgical raw materials, and the importing of mineral resources. Among which,

Welding flux materials business mainly involves imports and exports, and domestic trade as well. Since its foundation, the company, with more than ten-year’s unremitting efforts, has achieved a high reputation in supplying of welding flux materials. Currently, Longstone has been developed into a world-renowned welding flux materials supplier, whose main products include Bauxite, DBM, ferroalloys, chemical products and various metal powders, etc..