QuarkChain (QKC) is a decentralized blockchain platform that aims to achieve high transaction speeds and scalability through a unique two-layer architecture. It utilizes sharding technology to divide the network into smaller chains, allowing for parallel processing of transactions. QuarkChain also features a consensus mechanism that enables multiple nodes to validate transactions simultaneously. Overall, QuarkChain seeks to address the scalability issues faced by many existing blockchain networks, making it a potential solution for applications requiring high transaction throughput.