Legal analysis: there are two kinds of documents needed to buy a car: 1, and to buy a car in full: ID card, driver's license, bank card and other documents are needed; 2. Loan to buy a car: you need a valid personal identity certificate of the car buyer, a letter of intent for buying a car issued by the car dealership, a personal income certificate and a certificate issued and sealed by the company, relevant materials for providing guarantee, a down payment certificate for buying a car, and two one-inch photos.

Legal basis: Article 12 17 of the Civil Code of People's Republic of China (PRC). If a traffic accident of a non-operating motor vehicle causes damage to the hitchhiker, the liability for compensation shall be reduced, except that the motor vehicle user has intentional or gross negligence.