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A child experiences an astronomical telescope at an ocean park in Yantai, east China's Shandong Province, Sept. 16, 2017. A variety of activities of popularization of science were held across the county. (Xinhua/Tang Ke)
A child experiences an astronomical telescope at an ocean park in Yantai, east China's Shandong Province, Sept. 16, 2017. A variety of activities of popularization of science were held across the county. (Xinhua/Tang Ke)