The total output value of China's automobile industry accounts for a large proportion of GDP and is one of the pillar industries of the national economy. The industry chain of the auto industry is long and widely radiated, and there are many upstream and downstream industries related to it. Its upstream involves steel, machinery, rubber, petrochemical, electronics, textile and other industries, and its downstream involves insurance, finance, sales, maintenance, gas stations and other industries, so it is very important to keep the supply chain of the auto industry stable.

     According to the research report of Guangfa Securities Macro Group, "How does the auto cycle affect the macro economy? : Measured by total output value, the proportion of automobiles in the whole economy was 4.1% in 2017, while the influence of its associated industries is even greater; among the downstream demand of automobiles, 20%-30% corresponds to consumption and 60%-70% corresponds to investment; considering from the perspective of industrial economics, if we use the input-output table to calculate the influence coefficient of the industry, the synergistic driving effect of the automobile industry on other industries is among the 53 industries It ranks 4th, after computer communication, chemical fiber manufacturing and electrical machinery.