In December 2016, Buick Yinglang was used to collect and analyze the CAN protocol. The EST580 module serial port was used to execute the control command. The reverse engineering cracked the car CAN_ID, and the total mileage, remaining oil, VIN and other body data were applied to the points. When renting, with RFID card to the door, the car 4GWIFI makes it more competitive.