June 16 to June 18, 2023. Who official website inquired about the national college students' social practice and science and technology competition on energy conservation and emission reduction, and the preliminary examination time of the national energy conservation and emission reduction competition was from May 23rd to June 10, and the preliminary examination results were from June 16 to June 18. Hold an expert meeting to determine the finalists and other award-winning works, and publicize them for 10 days. The National College Students' Social Practice and Science and Technology Competition on Energy Conservation and Emission Reduction is a national college students' subject competition sponsored by the Higher Education Department of the Ministry of Education, and it is also the only competition organized by the Office of the Higher Education Department.