Metis is an open framework based on two-tier protocol, which is used for the creation, management and development of decentralized self-organizing company DAC. It distinguishes Dao from DAC and describes the latter as a subclass of Dao. The Dao focuses on governance issues, while the DAC is specifically designed to address the day-to-day operational and management issues of the project. It focuses on building a sustainable and decentralized company on the high-performance underlying blockchain through the DAC framework. Project introduction Metis is the infrastructure of layer2 supporting the operation of Web 3.0 economy. The goal of Metis is not only to reduce gas fees and improve transaction efficiency, but also to focus on the scalability and ease of construction of functions on layer2. Metis also integrates the architecture of the decentralized company (DAC) into its layer2 infrastructure to facilitate developers, project parties and community leaders to build their applications and communities. Metis uses preset tools, templates and interfaces to make application development and collaborative management easier, and enables projects and communities to enjoy the advantages of Ethereum ecology without worrying about the bottleneck of Ethereum in terms of cost and efficiency. Metis' highly scalable layer2 infrastructure supports a wide range of user cases, including NFT platform, decentralized social platform, open source developer community, opinion leader community, game community, casual economy, crowdfunding, liquidity mining, decentralized exchanges, etc.