Siacoin Classic (SCC) is the original chain of Cloud Storage Coin (SC), which was forked at block height 179,000 of Cloud Storage Coin (SC). After the fork, Siacoin Classic inherited the main features of the original Sia Coin. The algorithm and mining method are consistent with the currency before the fork, and at the same time, they are supported by the original miners and mining pools before the fork. The founding team, SiaClassic Foundation, is a community-oriented non-profit organization that aims to use SiaClassic to advance scientific research on blockchain technology. Cloud Storage Classic (SCC) not only has traditional cloud storage functions, but also solves the security and privacy problems of traditional cloud storage.