To optimize parking space, Lyon-Saint Exupery Airport in France introduced a robot valet named Stan to park customers' cars automatically. /VCG Photo

People need to park their vehicles at a drop-off point first to use this service and then start a robot through the application on touching screens. /VCG Photo

Robot valets have been applied to artificial intelligence and military GPS. /VCG Photo

Starting the testing phase since June 2018, the robot company has put four Stan valet-robots into operation to serve 500 parking spaces in Lyon-Saint Exupery Airport. /VCG Photo