Recently, the Central Committee of the Communist Party of China and the State Council issued the Opinions on Building a Data Base System to Give Better Play to the Role of Data Elements (hereinafter referred to as the Opinions), which proposed 20 policies and measures from four aspects of data property rights, circulation transactions, income distribution and security governance to accelerate the construction of China's data base system. This will promote the efficient circulation and use of data, activate the potential of data elements, and have a positive and far-reaching impact on promoting the development of the digital economy. The development of digital economy is a strategic choice to grasp the new round of scientific and technological revolution and new opportunities for industrial reform. In the era of digital economy, explosive growth and massive aggregation of data have increasingly become indispensable new production factors, which constitute an important strategic resource of the country and contain huge value. On the one hand, data is the basis of digitalization, networking and intelligence, and it is rapidly integrated into production, distribution, circulation, consumption and social service management. On the other hand, only when data flows can more possibilities and greater productivity be generated. Constantly improving the basic system of data and accelerating the construction of a national unified data element market can promote the market-oriented configuration of data elements, meet demand and realize value. Therefore, building a data based system is not only a key measure to promote the development of the digital economy, but also an important part of promoting high-quality economic and social development, and promoting the modernization of the national governance system and governance capacity. Since the 18th National Congress of the Communist Party of China, China has actively explored and promoted the marketization of data elements, accelerated the construction of a digital economy with data as the key element, and made positive progress. From the Opinions on Building a More Perfect System and Mechanism for Market based Allocation of Factors, which proposed to speed up the cultivation of the data factor market, to the first time that the civil code included data in the scope of protection, to the introduction of data security law, personal information protection law and other laws and regulations, to the "Fourteenth Five Year" Digital Economy Development Plan, which made important arrangements for giving full play to the value of data factors, a series of policy initiatives and institutional arrangements, The top-level design and directional guidance of the data element market have been formed, and the four beams and eight pillars of the market-oriented configuration reform of data elements have been constructed. The Opinions issued this time adhere to the main line of promoting data compliance and efficient circulation and use, enabling the real economy, build four systems around data property rights, circulation transactions, income distribution, and security governance, and promote four measures, including strengthening the Party's overall leadership in building the basic data system, increasing policy support, actively encouraging experimental exploration, and steadily promoting system building, It aims to effectively remove the institutional barriers that hinder the supply, circulation and use of data elements. The accelerated release of institutional dividend will help to give full play to China's massive data scale and rich application scenarios, give full play to the role of data elements, and promote the in-depth development of the digital economy. Building a data based system is a landmark, overall and strategic measure for China's reform and opening up in the new era. Since the reform and opening up, China's institutional breakthroughs and institutional innovations in land, labor, capital, technology and other key production factors have effectively improved the quality and efficiency of development. In the era of digital economy, digital technology is a new type of productivity with fast iteration and update, high efficiency and low application cost. Data is