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Students of a pre-school education college put the final touches on two Transformers made of recycled carton boxes in Mudanjiang, northeast China's Heilongjiang Province, June 16, 2019. (Xinhua/Zhang Chunxiang)
Students of a pre-school education college put the final touches on two Transformers made of recycled carton boxes in Mudanjiang, northeast China's Heilongjiang Province, June 16, 2019. (Xinhua/Zhang Chunxiang)