Combo photo shows a teacher from No. 4 High School of Xiangyang giving an on-line class to students via a multi-media system in Xiangyang City, central China's Hubei Province, April 10, 2020 (top) and senior students at No. 4 High School of Xiangyang taking a face-to-face class on May 7, 2020. Graduating high and vocational school students in Hubei Province returned to schools on Wednesday. (Xinhua/Xie Jianfei) 
 

Senior students at No. 4 High School of Xiangyang take a class in Xiangyang City, central China's Hubei Province, on May 7, 2020. Graduating high and vocational school students in Hubei Province returned to schools on Wednesday. (Xinhua/Xie Jianfei)

Senior students at No. 4 High School of Xiangyang take a class in Xiangyang City, central China's Hubei Province, on May 7, 2020. Graduating high and vocational school students in Hubei Province returned to schools on Wednesday. (Xinhua/Xie Jianfei)

Combo photo shows a teacher from No. 4 High School of Xiangyang giving an on-line class to students via a multi-media system in Xiangyang City, central China's Hubei Province, April 14, 2020 (top) and senior students at No. 4 High School of Xiangyang taking a face-to-face class on May 7, 2020. Graduating high and vocational school students in Hubei Province returned to schools on Wednesday. (Xinhua/Xie Jianfei)

Combo photo shows a teacher from No. 4 High School of Xiangyang giving an on-line class to students via a multi-media system in Xiangyang City, central China's Hubei Province, April 10, 2020 (top) and senior students at No. 4 High School of Xiangyang taking a face-to-face class on May 7, 2020. Graduating high and vocational school students in Hubei Province returned to schools on Wednesday. (Xinhua/Xie Jianfei)