Chinese Vice Premier Liu He, also a member of the Political Bureau of the Communist Party of China (CPC) Central Committee, attends the launch ceremony of the 20th National Science and Technology Week in Beijing, capital of China, Aug. 23, 2020. Cai Qi, a member of the Political Bureau of the CPC Central Committee and secretary of the Beijing Municipal Committee of the CPC, also attended the ceremony. (Xinhua/Liu Bin)