The Galaxy Data Chain (GDC) has emerged to address existing challenges. GDC is a storage-focused public blockchain that employs Proof of Space and Time and Proof of Replication, utilizing slicing deduplication encryption technology. This enables efficient storage of large files while ensuring the security and privacy of data. It specifically tackles the bottleneck of massive data storage in Blockchain 2.0 technology. The GDC public chain provides a suite of foundational capabilities including infinitely scalable storage, high-throughput computing, and fast network transmission. These services allow decentralized applications to easily handle data generation, transmission, storage, retrieval, and computation. GDC is optimized for Internet of Things (IoT) and artificial intelligence scenarios, providing robust support for the secure circulation, storage, and maximization of big datas value, paving the way for intelligent IoT ecosystems.