Children experience VR devices at Nanjing Science and Technology Museum in Nanjing, east China's Jiangsu Province, Sept. 19, 2020. The 16th National Science Popularization Day kicked off on Saturday. Activities to popularize science started Saturday across the country and will last until Sept. 25. [Photo/Xinhua]
Children experience airflow tunnel at Hisense Sci-exploration Center in Qingdao, east China's Shandong Province, Sept. 19, 2020. The 16th National Science Popularization Day kicked off on Saturday. Activities to popularize science started Saturday across the country and will last until Sept. 25. [Photo/Xinhua]
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