QuarkChain is a decentralized blockchain utilizing a two-layered structure with elastic sharding to achieve high scalability and throughput. It employs a root blockchain that confirms blocks from multiple shard blockchains, aiming to resolve network scalability issues and support over one million transactions per second.

The network ensures security by allocating at least 50% of hash power to the root chain to prevent double-spending. It promotes decentralization through clusters of cheap nodes acting as super-full nodes and supports efficient cross-shard transactions. A single account manages all assets across shards within its smart wallet.