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A visitor takes photos at the Nanjing Museum in Nanjing, capital of east China's Jiangsu Province, May 3, 2019. People learn knowledge in various museums during the Labor Day holiday. (Xinhua/Liu Jianhua)
A visitor takes photos at the Nanjing Museum in Nanjing, capital of east China's Jiangsu Province, May 3, 2019. People learn knowledge in various museums during the Labor Day holiday. (Xinhua/Liu Jianhua)