Generally, only when you buy a car by mortgage can you mortgage a green one. It is the so-called installment car, and it is false to say that it will not mortgage anything. Because banks are also guaranteed, tens of thousands of loans are given to others to buy cars, and the Green Paper has no mortgage. 4S shops deduct motor vehicle registration certificates, commonly known as Big Ben, and basically all vehicles are mortgaged. 4S stores are all betting big money, which is the industry regulation. Because your car has not fully paid off the loan, in order to prevent you from selling the car or mortgaging the car, you will detain big money. Selling or mortgaging vehicles requires a motor vehicle registration certificate, and 4S stores are also afraid of money and money. After the general loan is paid off, the 4S shop will return the big book.