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In spite of the small market scale presently, the global demand for graphene after commercial production will be enormous. Take semiconductor silicon for example, the worldwide demand approximates 2,500 tons per annum. Provided that one tenth of crystalline silicon will be substituted by graphenes to make high-end integrated circuit, the market capacity of graphenes will be at least RMB500 billion. In addition, graphenes can be also used to make lithium ion battery anode materials, which can significantly improve the battery performance. Worldwide, the annual demand for anode materials surpasses 30,000 tons and keeps a growth rate of 20% or more. Provided graphenes are used to make anode materials that were used for one tenth of lithium ion batteries, the demand will grow to over 3,000 tons.