The automotive chain is an ecological chain that connects services from various industries in the automotive aftermarket. The automotive chain relies on vehicle OBD interface data to standardize and package the basic information, condition data, driving data, repair and maintenance, insurance records, etc. of vehicles on the chain. The distributed ledger and smart contract technology of blockchain technology are used to achieve value conversion after data on the chain, creating the value of "driving 1 kilometer, rewarding 1 point, and worth 1 yuan" for car owners; At the same time, it will create additional value-added services for Vehicle-to-everything operation and automotive aftermarket service providers. Blockchain+artificial intelligence and Big data technology will provide traffic management departments with traffic condition prediction and intelligent city management....