No need. According to the "Measures for the Administration of Recycling of Scrapped Vehicles", scrapped vehicles cannot be bought and sold privately, and the agreement for the sale and purchase of scrapped vehicles is invalid. Even if a contract is signed, it will not be legally binding, and there is no need to sign a contract. The "Measures for the Management of Scrapped Automobile Recycling" is a government document that regulates the management of scrapped automobile recycling. It was adopted at the 41st Executive Meeting of the State Council on June 13, 2001.