By the end of 2023, the number of household appliances such as refrigerators, washing machines, and air conditioners in China will exceed 3 billion units, and there is a trillion yuan market space for the upgrading of automobiles and household appliances. Consumption is an important engine for economic development, connecting one end to the macro economy and the other end to thousands of households. Multiple regions have introduced detailed measures, and enterprises such as automobiles, home appliances, and home furnishings have responded one after another. At the same time, with the development of new models such as "Internet plus+second-hand", consumers' trade in chain is shorter, costs are lower, and experience is better. On the one hand, China's consumer market is generally transitioning from the "incremental era" to the "era of equal emphasis on both incremental and stock". Implementing trade in of consumer goods can generate more effective demand. By eliminating outdated products and production capacity, it is conducive to promoting high-quality development of the industry, improving production efficiency and the proportion of advanced production capacity, accelerating the transformation of the consumer market from "whether there is" to "whether it is good or not", and enabling more high-quality durable consumer goods to enter residents' lives. At the same time, promoting supply side innovation, enterprises can carry out technological development based on the needs of more users, and launch more intelligent, green, and personalized new products. On the other hand, promoting the exchange of old for new consumer goods contains significant green ecological benefits. The "Action Plan for Promoting Large scale Equipment Renewal and Consumer Goods Trade in" issued by the State Council proposes that by 2027, the amount of recycled waste household appliances will increase by 30% compared to 2023. Promoting the trade in of old consumer goods can not only stimulate consumption and investment, but also promote energy conservation and carbon reduction, and reduce safety hazards. To promote the exchange of old for new, the key is to smooth the entire chain and play a good combination of punches. Intensify the support of fiscal, financial, and tax policies, strengthen the guarantee of land and energy use factors, and technological innovation support, strengthen the development of the "trade in+recycling" logistics system and new models, smooth the chain of resource recycling, and trade in old for new will definitely benefit both enterprises and the people, unleashing enormous market potential. (New Society)