First, there are many channels for second-hand car dealers to collect cars, including the following ways: 1, dealers with storefronts and venues will have customers who take the initiative to sell cars, 2, those without storefronts will send small advertisements everywhere to find customers, and there are small cards like "collecting cars at high prices", 3, find car sales users through the Internet, call "harassment" and find individuals in major second-hand car trading platforms. This channel will contact a large number of car owners, and a large part of the vehicles replaced by 4S shops are bought by used car dealers. 6. Collect C2B platforms of cars through the used car auction platform. 7. Baidu, used car websites and other online advertisements. 8. Introduction of other casual friends.