When the car loan is paid off, the bank will unbind it and give you a little green paper. You can take the green paper to the vehicle management office to decompress.
Red book and green book mainly refer to the cover color of Shenzhen real estate license. In Beijing, they are all red books, which are divided into big books and small books. Big capital can be listed (referring to selling, buying and transferring, just the same as Taiwan Province stock market, but with different concepts), while small capital refers to small property houses, which cannot be bought or sold.