Yunhan Intelligent Technology Co., Ltd. is located in Heilongjiang Province, with rich mineral resources and a production capacity of 10,000 tons/year. (Heilongjiang province is China's largest graphite mining area,take more than 60% of the China's output). Mainly produce various size of graphite powder, flake graphite, machine-processed flake graphite and other high-carbon, high-purity graphite and related graphite products. Independent R&D, testing Laboratory. Supply qualified graphite products to many industry, such as refractory materials, metallurgy, batteries, pencil manufacturing, new materials, super capacitors and so on. Our company cooperates with the largest graphite pencil factory in China, developing and producing special graphite for graphite and resin pencil lead. We passed the ISO, xxx, xxx international authoritative testing and certification. Products are exported to Japan, South Korea, Germany, the United States, India and other 17 countries and regions.