With the rapid development of society and economy and the acceleration of urbanization, the problem of environmental pollution is becoming more and more serious, especially the air quality problem has aroused great concern of the whole society. Faced with the grim situation, the state and local governments have issued a series of policies and regulations, intensified the efforts to control air pollution, and significantly improved China's air quality.

　　First of all, in the top-level design, China regards the "blue sky defense war" as an important part of the tough battle against pollution, and has formulated the "Three-year Action Plan to Win the Blue sky defense war", which defines the specific objectives, key tasks and safeguard measures. At the same time, the newly revised Air Pollution Prevention and Control Law was officially implemented on January 1, 2016, providing a solid legal basis for pollution control according to law. In addition, a cross-regional joint prevention and control mechanism has been established to strengthen coordination and cooperation between key areas such as Beijing-Tianjin-Hebei and Yangtze River Delta, forming a good situation of jointly promoting the continuous improvement of atmospheric environmental quality.

　　Secondly, in terms of technical means, it is one of the most direct and effective ways to reduce pollutant emissions by promoting the use of clean energy and optimizing the energy structure. For example, vigorously develop renewable energy such as wind energy and solar energy; Accelerate the pace of ultra-low emission transformation of coal-fired units; Encourage and support the development of electric vehicle industry and so on. At the same time, the use of big data, cloud computing and other information technologies to build an intelligent monitoring and early warning system, to achieve accurate control, improve work efficiency and service level.

　　Thirdly, public participation is also an indispensable force. Governments at all levels widely publicize environmental protection knowledge through various channels, enhance citizens' sense of responsibility, and guide everyone to establish a green and low-carbon lifestyle concept. For example, advocating walking or cycling instead of driving; Participate in afforestation activities; Actively report illegal sewage disposal. These seemingly trivial things can converge into powerful positive energy between bits and pieces, and jointly protect the beautiful home on which we live.

　　In a word, through unremitting efforts, China's air quality situation has shown a trend of steady improvement, but there is still a certain gap from the expectations of the people. It is still necessary to continue to deepen institutional reform, strengthen scientific and technological innovation, unite social consensus, and form a working pattern of concerted efforts to make the sky bluer, the water clearer and the land greener a reality.