
Students of Zhejiang University of Technology perform during a celebration of the Youth Day, which falls on May 4, in Hangzhou, east China's Zhejiang Province, May 3, 2017. (Xinhua/Xu Yu)

Students of Zhejiang University of Technology perform during a celebration of the Youth Day, which falls on May 4, in Hangzhou, east China's Zhejiang Province, May 3, 2017. (Xinhua/Xu Yu)