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| A tree hollow painting is seen at Shanghai Polytechnic University in Shanghai, East China, Sept 19, 2016. Fifteen art students of the university created 30 tree hollow paintings on campus to greet freshmen as new semester started. (Photo/Xinhua) |
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| A tree hollow painting is seen at Shanghai Polytechnic University in Shanghai, East China, Sept 19, 2016. ( Photo/Xinhua) |
