It should be the second-class seller of the local 4s shop. They can get into the car from the 4s shop and resell it themselves to earn the difference. Generally, secondary sellers cannot issue automobile sales invoices. If you want to drive a car in a 4s shop, you'd better be careful, because there is another case where the car is cheap and it is damaged or in stock. When picking up the car, you should carefully check the condition of the car, whether there are signs of maintenance, the date of manufacture, and ask him for the car. Some 4s shops mortgage their car certificates to banks for loans, and then return the money to customers when the cars are sold. Generally, when you pick up the car, you won't get it right away. It's nothing to wait for a few days, as long as you don't delay getting the card.