Students visit a memorial of the cemetery of martyrs in Xi'an after a ceremony to honor and remember deceased national heroes on the country's second Martyrs' Day in Xi'an, northwest China's Shaanxi Province, Sept. 30, 2015. (Xinhua/Liu Xiao)
Students visit a memorial of the cemetery of martyrs in Xi'an after a ceremony to honor and remember deceased national heroes on the country's second Martyrs' Day in Xi'an, northwest China's Shaanxi Province, Sept. 30, 2015. (Xinhua/Liu Xiao)