Teacher Liu Feng gives online course to his students at a middle school in Urumqi, northwest China's Xinjiang Uygur Autonomous Region, Feb. 3, 2020. In order to prevent and control the spread of the novel coronavirus, the opening of the new semester of schools in Xinjiang has been postponed. Some schools has given online courses to students preparing for the senior high school and college entrance exams. (Xinhua/Ding Lei)

Teacher Wang Yao records the video course at a middle school in Urumqi, northwest China's Xinjiang Uygur Autonomous Region, Feb. 3, 2020. In order to prevent and control the spread of the novel coronavirus, the opening of the new semester of schools in Xinjiang has been postponed. Some schools has given online courses to students preparing for the senior high school and college entrance exams. (Xinhua/Ding Lei)

Teacher Zhang Weibao attends the shooting of video course at a middle school in Urumqi, northwest China's Xinjiang Uygur Autonomous Region, Feb. 3, 2020. In order to prevent and control the spread of the novel coronavirus, the opening of the new semester of schools in Xinjiang has been postponed. Some schools has given online courses to students preparing for the senior high school and college entrance exams. (Xinhua/Ding Lei)

Teachers exchange ideas on giving online courses at a middle school in Urumqi, northwest China's Xinjiang Uygur Autonomous Region, Feb. 3, 2020. In order to prevent and control the spread of the novel coronavirus, the opening of the new semester of schools in Xinjiang has been postponed. Some schools has given online courses to students preparing for the senior high school and college entrance exams. (Xinhua/Ding Lei)