Teachers hands out face masks to students in Huizhi Middle School in Xi'an, northwest China's Shaanxi Province, April 7, 2020. Students in the final year of junior high schools or vocational schools returned to school on Tuesday in Shaanxi. (Xinhua/Liu Xiao)
Students queue up to go through body temperature monitoring system in Huizhi Middle School in Xi'an, northwest China's Shaanxi Province, April 7, 2020. Students in the final year of junior high schools or vocational schools returned to school on Tuesday in Shaanxi. (Xinhua/Liu Xiao)
Students queue up to return to school in Huizhi Middle School in Xi'an, northwest China's Shaanxi Province, April 7, 2020. Students in the final year of junior high schools or vocational schools returned to school on Tuesday in Shaanxi. (Xinhua/Liu Xiao)
A teacher hands out face masks to students in Huizhi Middle School in Xi'an, northwest China's Shaanxi Province, April 7, 2020. Students in the final year of junior high schools or vocational schools returned to school on Tuesday in Shaanxi. (Xinhua/Liu Xiao)
Students queue up to enter the campus in Huizhi Middle School in Xi'an, northwest China's Shaanxi Province, April 7, 2020. Students in the final year of junior high schools or vocational schools returned to school on Tuesday in Shaanxi. (Xinhua/Liu Xiao)
Students attend class in Huizhi Middle School in Xi'an, northwest China's Shaanxi Province, April 7, 2020. Students in the final year of junior high schools or vocational schools returned to school on Tuesday in Shaanxi. (Xinhua/Liu Xiao)