Since building a modern economic system is the action of starting the modernization process, it is necessary to solve the connection between the construction of modern economic system and the content of modernization. Now China's economic development has entered a new era, especially modernization on the basis of the completion of the building of a moderately prosperous society in all respects. At this starting point, the specific content of the synchronization of "Four Modernizations" should also bear the characteristics of the new era, which involves the specific direction and connection of building a modern economic system.The above analysis shows that after entering the new era, the four aspects of modernization have new contents. New industrialization is the core of modern industrial system; urbanization upgrades to the citizenization of towns and urban modernization; informatization upgrades to modern informatization, which is the main driving force of today's scientific and technological modernization and the modernization of industry and agriculture; agricultural modernization is to make up for the shortcomings of "Four Modernizations", and we should rely on scientific and technological innovation to make up for the short board of agricultural modernization. In order to start the new journey of modernization with high quality, the modern economic system to be built must be connected with the new requirements of "Four Modernizations" in the new era, so as to lay a solid foundation for the whole process of modernization.
