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Visitors watch a displayed tripod on Chinese Ding Culture Exhibition in Zhengzhou, capital of central China's Henan Province, Sept. 28, 2013. The exhibition opened here Friday Sept. 27. (Xinhua/Zhu Xiang)

Visitors watch a displayed tripod on Chinese Ding Culture Exhibition in Zhengzhou, capital of central China's Henan Province, Sept. 28, 2013. The exhibition opened here Friday Sept. 27. (Xinhua/Zhu Xiang)