The hybrid blockchain platform Cypherium is a public chain that uses the hybrid consensus mechanism (POW+HotStuff BFT), supports smart contracts of Java virtual machine and programming language, reduces the threshold for smart contract development, and connects to the huge and perfect Java ecosystem. Cypherium's vision is to bring blockchain technology into the era of large-scale commercial use. By building a dual layer architecture of POW+HotStuff, separating the execution and verification of smart contracts, we aim to better address the scalability issues of blockchain while maintaining complete license free decentralization....