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Children play by a sand table in Chengdu, capital of southwest China's Sichuan Province, June 1, 2018. Various activities were held across China to celebrate the International Children's Day. (Xinhua/Li Xiaoyu)

Children play by a sand table in Chengdu, capital of southwest China's Sichuan Province, June 1, 2018. Various activities were held across China to celebrate the International Children's Day. (Xinhua/Li Xiaoyu)