Students wait to leave at a school in Beirut, Lebanon, Dec. 2, 2020. Students returned to school as Lebanon started lifting lockdown measures gradually from Monday.(Photo: Xinhua)

Students take a class at a school in Beirut, Lebanon, Dec. 2, 2020. Students returned to school as Lebanon started lifting lockdown measures gradually from Monday.(Photo: Xinhua)

Students take a class at a school in Beirut, Lebanon, Dec. 2, 2020. Students returned to school as Lebanon started lifting lockdown measures gradually from Monday. (Photo: Xinhua)

A student waits to leave at a school in Beirut, Lebanon, Dec. 2, 2020. Students returned to school as Lebanon started lifting lockdown measures gradually from Monday.(Photo: Xinhua)