Galaxy Data Chain (Galaxy Data Chain, referred to as GDC) came into being. GDC is a storage-type public chain. It adopts space-time proof and copy proof, and uses slice deduplication and encryption technology to realize efficient storage of large files and guarantee data. The security and privacy of blockchain solve the bottleneck of massive data storage in blockchain 2.0 technology. The GDC public chain provides a series of basic capability services including infinitely scalable storage, high-throughput computing, and fast network transmission, enabling distributed applications to easily complete data generation, transmission, storage, retrieval, and computing. The GDC public chain is optimized for the Internet of Things and artificial intelligence scenarios. It provides strong support for the safe circulation, storage, and full play of value of big data to create a smart Internet of Things.