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Children send off Tokyo 2020 Caravan during a celebration to mark 500 days to go before the Tokyo 2020 Summer Olympic Games open in Tokyo, Japan, March 12, 2019. (Xinhua/Du Xiaoyi)
Children send off Tokyo 2020 Caravan during a celebration to mark 500 days to go before the Tokyo 2020 Summer Olympic Games open in Tokyo, Japan, March 12, 2019. (Xinhua/Du Xiaoyi)