A child learns waste sorting at the Hefei Institutes of Physical Science of the Chinese Academy of Sciences during an event for the National Science Day in Hefei, capital of east China's Anhui Province, Sept. 19, 2020. (Xinhua/Zhang Duan)
People visit Hefei Institutes of Physical Science of Chinese Academy of Sciences
Source: Xinhua| 2020-09-19 16:20:12|Editor: huaxia
