YINCHUAN, May 11, 2016 -- Students listen to a class on earthquake at the No. 3 primary school in Yongning County of northwest China's Ningxia Hui Autonomous Region, May 11, 2016. Various activities such as drills, classes, trainings were held in the school on Tuesday to improve the students and teachers' reaction on earthquake and relative disasters. (Xinhua/Peng Zhaozhi)
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