Project introduction: throughout the digital currency market, shared file is the only digital currency that is truly applied. Based on the consensus mechanism of POC, it tries to establish an ecological value system of storage and hard disk mining, so as to promote the industry development of blockchain. The shared file token, referred to as SFC, issued 100000000 pieces, released 100000000 pieces in the early stage, and 900000000 tokens in the later stage were all produced through mining.