As an outstanding representative of public chains in the era of Blockchain 4.0, X-Block is the first global public chain built on the Fog computing framework, which aims at creating a user-friendly, convenient and open light eco-blockchain. Relying on the Fog computing framework, X-Block can, utilize various heterogeneous devices (including personal computers, smartphones, routers, etc.) to form a decentralized computing engine. By creatively designing the “Galaxy Super-Contract”, it enables the smart contract to maximally invoke the powerful Fog computing proprietary technology. Meanwhile, computing resources of the surrounding idle equipment can be integrated via X-Block. This will further empower the blockchain to be integrated into everyday technological processes. Such as artificial intelligence, big data and Internet of Things. Thus, a disrupting smart blockchain era can be ushered in to deeply promote applications of blockchain technology in day-to-day life. X-Block is committed to the construction of a complete blockchain ecosystem and X-Block has built X-Change along with X-Block’s fog computing and blockchain tools to accomplish the token ecosystem. X-Change is a community-autonomous exchange that incorporates X-Block tokens with trading and mining.