Children visit the Shanhaiguan Great Wall Museum in Qinhuangdao, north China's Hebei Province, May 17, 2018. May 18 marks the International Museum Day. (Xinhua/Cao Jianxiong)
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Children visit the Shanhaiguan Great Wall Museum in Qinhuangdao, north China's Hebei Province, May 17, 2018. May 18 marks the International Museum Day. (Xinhua/Cao Jianxiong)