DEL is a next-generation blockchain ledger dedicated to solving the current problems of blockchain application implementation and value realization. DEL promotes the application of global blockchain projects and opens the era of blockchain 4.0 through the provision of blockchain application ecological comprehensive services such as technical alliances, technology construction, and project incubation. DEL adopts sharding technology to completely solve the block capacity problem, and at the same time builds a Turing-complete blockchain operating system that supports any programming language and any application scenario based on the on-chain container technology.