Students wearing face masks attend a class on the first day of a new school year at a school in Tunis, Tunisia, on Sept. 15, 2021.(Photo: Xinhua)
Students wearing face masks attend a class on the first day of a new school year at a school in Tunis, Tunisia, on Sept. 15, 2021.(Photo: Xinhua)
Students wearing face masks wait to enter a school on the first day of a new school year in Tunis, Tunisia, on Sept. 15, 2021. (Photo: Xinhua)
Students wearing face masks enter a school on the first day of a new school year in Tunis, Tunisia, on Sept. 15, 2021.(Photo: Xinhua)