EUU-5G (Vehicle Chain Technology) is a decentralized automotive data ecosystem service platform established based on blockchain technology.The EUU-5G vehicle chain contract is based on the data provided by the vehicle OBD data interface. The vehicle data is collected through the OBD interface, and the basic information of the owner, vehicle driving data, detection and monitoring data, and driving habits data of the owner are packaged and linked. The reward for "driving 1 kilometer, rewarding 1 integral point, worth 10 cents" is given to the owner. The reward points can be exchanged for EUU to be monetized on the exchange or exchanged for goods in the mall. The EUU car chain contract is a link connecting C-end car owners, B-end car aftermarket service providers, OBD equipment operators, and car aftermarket service platforms....