In the lower left corner of the homepage, click the orange button of "motorcycle authenticity verification":
Then enter the frame number according to the prompt to verify the authenticity:
In addition to the certificate, you can also find the frame number of Yamaha Xunying in the car. There is a small rectangular cover under the front cargo box and in front of the pedal, which is the place to put your feet when riding. Pry open the lid and you will see the frame number. The picture below shows Yamaha Xunying.