This third plan was also given to me by my friend, and the specific action is like this: first find a car or car model you like, then go up and take a photo, and then take a little advantage.
According to Xu Xian's current outfit, he is a complete nerd and homebody, so if he does that, it will definitely cause the car model's disgust. If he can successfully provoke the car model's anger, he can make use of the situation. If the car model doesn't react, Xu Xian can touch the car. Generally, at car shows of this level, the exhibited cars are not meant to be touched. He'll persistently touch them, and the staff on site will surely stop him, allowing him to create a scene again.