Nerthus (Nerthus) is a general-purpose blockchain programming platform based on DAG technology, a decentralized distributed blockchain operating system. It can solve the problems of low throughput, transaction confirmation delay, and block expansion faced by traditional blockchain systems. Nerthus has its own Turing-complete programming language Witstone and operating environment OVM, which is compatible with Ethereum's Solidity and can be used to write Nerthus smart contract language, which greatly reduces the learning cost of developers and enables them to write Nerthus smart contracts in a short time. contract, to construct and define his own various characteristics, develop his own application and blockchain system and issue his own currency.