This chapter elaborates the research on the second-hand car market, the concept of second-hand car and second-hand car market at home and abroad, the theory of second-hand car-related theory, from wide to narrow, face-to-point, table and in the introduction of the relevant concepts and basic situation about the second-hand car market, so as to apply SWOT to the next chapter to analyze the market sales of second-hand car in Harbin City laid a good theoretical foundation
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