Source: Xinhua| 2018-09-18 22:14:08|Editor: Shi Yinglun
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Students from Sichuan University look at a science graffiti wall in Chengdu, southwest China's Sichuan Province, Sept. 18, 2018. Around 18,000 science promotion activities will be held nationwide during the National Science Day which lasts from Sept. 15 to 21. (Xinhua/Jiang Hongjing)
