Since the 18th CPC National Congress, the balance, coordination and sustainability of China's economic development have been significantly enhanced, and China's economy has embarked on a higher quality, more efficient, fairer, more sustainable and safer development path. At the same time, China's market economy is facing new internal and external environment and new risks and challenges. The existing local protection of "beggar thy neighbor" and the repeated construction to a certain extent brought by "GDP first" have caused the loss of resource allocation efficiency, multiple blocking points of economic cycle, invisible distortion of fair competition and other problems to varying degrees, which restricts the sustainable and healthy development of China's economy and society. Recently, the CPC Central Committee and the State Council issued the "opinions on accelerating the construction of a national unified market" (hereinafter referred to as the "opinions"). The opinions provides important guidance for breaking all kinds of obstacles in building a national unified market. It is a top-level system design with remarkable characteristics of the times. The unified market is a large market with the internal characteristics of space integration, full competition, effective division of labor, openness and flexibility under the unified coordination of the market mechanism. At the same time, it also has the significant external characteristics of large scale, complete structure, powerful function, flexible mechanism and environmental optimization under the overall coordination of the government. Building a national unified market can further cultivate and stimulate the potential of the domestic market, give further play to the advantages of super large market scale, and resist external uncertainty with its maximum certainty. First, we will accelerate the improvement of China's resource allocation efficiency. As the world's largest developing country, China should effectively allocate and rationally use its precious and limited resources. The well-known "Latin American Trap" and "middle-income trap" are closely related to resource mismatch and inefficient utilization. There is room for improvement in China's resource allocation efficiency. We can strengthen the unification of basic market systems and rules from the four aspects of property rights protection, market access, fair competition and social credit, establish a national unified market, promote the smooth flow of land, labor, capital, technology, data and energy on a larger scale, effectively improve the allocation efficiency, and then improve the economic cycle efficiency, enterprise production efficiency and total factor productivity. Second, it will further improve and optimize the business environment. On the one hand, there are great differences in the business environment in different regions of China, and even quite different in resource attraction, investment projects, industrial structure and development performance. On the other hand, to improve the business environment, it is not only necessary for individual regions and cities to continue to make progress in the protection of economic subjects, market access and exit, competition neutrality, government services, supervision and law enforcement, but also need to deal with the relationship between regionality and unity. On the basis of the continuous optimization of the business environment in the regional and urban internal markets, we must further eliminate various barriers and inconsistencies between regions and cities, strengthen the unification of market-based systems and rules, high-standard connectivity of market facilities, unification of factor and resource markets, high-level unification of commodity and service markets and fair and unified market supervision between regions and cities, and improve the average and overall level of the business environment in the country. Third, we will further solve the problem of insufficient and unbalanced development. China's market scale has ranked among the top in the world, but the large market does not naturally have corresponding scale benefits. The problems of large but not strong and insufficient and unbalanced development are still prominent. The in-depth promotion of regional coordinated development strategies such as the Great Bay area of Guangdong, Hong Kong and Macao, the integration of the Yangtze River Delta and the coordinated development of Beijing, Tianjin and Hebei have laid the foundation for the formation of a unified national market. However, for a long time, the development of some factor and resource markets has lagged behind, and the problems of local protection and market segmentation have not been fundamentally solved. It is urgent to continue to establish an integrated urban-rural and national unified factor market, resource market, commodity market and service market, so as to realize a high-level dynamic balance between demand and supply. The top-level design of building a national unified market is the key move and way to solve this problem. Fourth, we will accelerate the construction of a new pattern of "double cycle" development. The market is not only the basis of the cycle, but also the guarantee of the cycle. The construction of a new development pattern with the domestic big cycle as the main body and the mutual promotion of domestic and international double cycles must be based on the national unified big market, rather than all kinds of closed small markets, all kinds of selfish small circles and all kinds of exclusive small cycles. Only by breaking the regional and inter industry segmentation, building a national unified market, and promoting the free, orderly, safe and convenient cross-border flow of factors, can we form a strong attraction to global factor resources, improve the voice in international economic governance, gain new advantages in international competition and cooperation, and effectively strengthen the fundamental guarantee for global economic risk prevention. Fifth, there is an urgent need to solidly promote common prosperity. The market is the source of social wealth creation and an important source of public services. Only through the effective connection and efficient operation of the market, can we really open a benign channel from the improvement of market efficiency to the improvement of labor productivity, the increase of residents' income, the expansion of market subjects, the improvement of supply quality and the upgrading of demand, effectively form a benign interaction between supply and demand, the simultaneous development of production and marketing, and truly gradually narrow the income gap The income gap and the gap between urban and rural areas can effectively establish a mechanism for sustained and stable growth of residents' income and improve the level of public services, so as to jointly build and share and achieve common prosperity. Sixth, the role of super large market scale needs to be brought into play. Under the complex and severe situation at home and abroad, the repeated rebound of the epidemic in the century, and the gradual weakening of traditional advantages such as demographic dividend and reform dividend, we must make full use of and give full play to the unique advantage of China's economy, and give full play to the role of super large-scale market in promoting technological innovation, industrial upgrading and consumption through the integrated construction of national unified market rules, standard system, regulatory requirements and factor market, Promote China's economy to continue to move forward in the stage of high-quality development. Seventh, the aggravation of the epidemic and market division must be solved. The covid-19 pneumonia outbreak not only exposes market failures in the global value chain organization, exacerbate market fragmentation, increase operation and transaction costs, but also highlights the imbalance of living supplies, inadequate emergency logistics system, and the disunity of standards for prevention and control. Building a national unified market is not only a key move to break local segmentation, reduce transaction costs, optimize resource allocation and give full play to the advantages of a large country, but also an important move to establish an effective linkage mechanism between relevant central departments, between central and local governments, and between central and local governments and enterprises, so as to carry out top-level design, overall planning and unified dispatching of material support and prevention and control measures, So as to effectively deal with the epidemic prevention and control, speed up the resumption of work and production and ensure the stable development of the economy. (Xinhua News Agency)