TANGSHAN, April 29, 2016 -- Visitors take photos of tulips during the Tangshan World Horticultural Exposition 2016 in Tangshan City, north China's Hebei Province, April 29, 2016. The Tangshan World Horticultural Exposition 2016 opened here on Friday and will last for 171 days. (Xinhua/Zhu Xudong)
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