CHENGDU, May 4, 2016 (Xinhua) -- Sophomores practice their standing postures with a piece of paper between their legs at Chengdu Aeronautic Polytechnic in Chengdu, capital of southwest China's Sichuan Province, May 4, 2016. Young people train hard to be professional flight attendants at the school. (Xinhua/Xue Yubin)
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