Our project, named Monas, is a decentralized Personal Data Store (PDS). This system utilizes the encrypted data structure of Cryptree and the authenticity-guaranteeing technology of Blockchain as its core, enabling users to manage their own data while ensuring privacy and interoperability. Unlike traditional "solid-line data links," Monas introduces a new paradigm of data management through "dotted-line data links," directly reflecting the user's intentions. This approach creates a space in cyberspace that protects autonomy and privacy.  In the prototype, we focused on implementing the Cryptree algorithm and the state management of the PDS. For more details, please check this link. https://github.com/Monas-project/Filecoin-Data-Economy-Hackathon/blob/main/docs/prototype.md