Directory blockchain platform of Xicheng District: This platform has “duty directories” of committees, offices and bureaus of Xicheng District registered on a blockchain based on our basic blockchain service platform and in accordance with “system directory-resource directory-inventory directory-data directory”. A distributed system has been constructed for unified control over directories of the entire district. This directory blockchain platform makes data sharing automatic, fully traceable, safe and controllable by storing directories, clarifying data sharing rules and recording data access processes. It builds new models for Xicheng District to share and evaluate government data, efficiently laying a foundation for unified scheduling, management and control of government data.