Students lay flowers to tombs of unknown martyrs in Zaozhuang, east China's Shandong Province, April 4, 2018. People mourn for the martyrs as the Qingming Festival, the Chinese tomb-sweeping day, approaches. (Xinhua/Sun Zhongzhe)
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Students lay flowers to tombs of unknown martyrs in Zaozhuang, east China's Shandong Province, April 4, 2018. People mourn for the martyrs as the Qingming Festival, the Chinese tomb-sweeping day, approaches. (Xinhua/Sun Zhongzhe)
