Automobile logo is the symbol of various automobile brands and is usually regarded as the symbol of automobile enterprises. These include automobile trademarks or factory signs, product number plates, engine models and factory numbers, vehicle models and factory numbers, vehicle identification codes and other symbols. Therefore, cars should have their own symbols, indicating the manufacturer, model, engine power, bearing quality, engine and vehicle factory numbers and other related information. The function of these symbols is to facilitate the identification of vehicles by sellers, users, repairers and travel management departments. According to China's national regulations, new car registration and annual inspection usually need to detect these markers.