The Aptos blockchain is a transformative web3 infrastructure, devised to overcome the prevalent limitations of blockchain technology, such as frequent outages, high costs, and low throughput. It emerges from years of research and development by a global team, integrating advancements in consensus, smart contract design, system security, and decentralisation. Aptos is rooted in the principles of scalability, safety, reliability, and upgradeability, aiming to bring about mass adoption of blockchain technology. It introduces the Move programming language, which ensures fast and secure transaction execution, alongside innovations like flexible key management and a safer user experience. The Aptos blockchain architecture supports frequent and instant upgrades, embedding on-chain change management protocols to adapt swiftly to new technologies and web3 use cases.