CHXC (Stellar Coin) is a blockchain-based smart contract consensus network for hard drive mining, designed for certified entity identities; it establishes a decentralized, resource-sharing, and self-developing smart ecosystem rapidly for different certified entities and applications, with full user privacy protection and identity authentication mechanisms. This is all built upon the low-cost, high-efficiency DPOC (Distributed Proof of Capacity) distributed capacity proof consensus algorithm and customized smart contracts.