Locus Chain is The World’s First Practically Usable Public Blockchain. Locus Chain has achieved scalability in its decentralized public network by overcoming the following challenges. Challenge 1: SPEED Popular blockchains today have well-known limitations in SPEED. Locus Chain achieves SPEED by adopting a DAG ledger structure. Challenge 2: STORAGE In addition to speed, a practical blockchain must address the issue of STORAGE. Locus Chain aims to resolve the STORAGE issue via Verifiable Pruning Challenge 3: NETWORK SCALABILITY A practical blockchain must also address the issue of Network Scalability. Locus Chain aims to resolve the Network Scalability issue via Dynamic Sharding Challenge 4: DECENTRALIZATION & SECURITY Locus Chain achieves Decentralization and Security by implementing BFT based on DPoS.