Liu He attends launch ceremony of 20th National Science and Technology Week in Beijing Xinhua English 2020.08.2410:31 关注 2张Chinese Vice Premier Liu He, also a member of the Political Bureau of the Communist Party of China Central Committee, attends an activity during the launch ceremony of the 20th National Science and Technology Week in Beijing, capital of China, Aug. 23, 2020. (Xinhua/Liu Bin)