Students pass through a temperature checkpoint Tuesday to enter an elementary school in Lianyungang, East China’s Jiangsu province. The city requires students to take temperature test and hand in health and travel codes to prevent the spread of Covid-19. Photo: VCG

Students carry textbooks in an elementary school in Lianyungang on Monday. Photo: VCG

A student stands in line holding health and travel codes to register for the new semester at an elementary school in Honghe Hani and Yi Autonomous Prefecture, Southwest China’s Yunnan province, on Sunday. Photo: VCG

First-grade students attend a class Monday in a primary school in Hefei, East China’s Anhui province. Photo: VCG

Middle school students go through temperature check Monday before entering the campus in Suzhou, East China’s Jiangsu province. Schools of the city staggered students’ return to ensure social distancing for pandemic prevention. Photo: VCG

Parents help students move to the campus at a middle school in Yuncheng, North China’s Shanxi province, on Monday. Photo: VCG

Students line up to get Covid-19 tests Saturday in Yuexiu district of Guangzhou, South China’s Guangdong province, before the beginning of the new semester. Photo: Chen Chuhong/China News Service, VCG

Workers spray disinfectant in a classroom in an elementary school Sunday in Taiyuan, North China’s Shanxi province. Photo: Zhang Yun/China News Service, VCG

Parents wait to pick up their kids Sunday outside an elementary school in Beijing. The city has adjusted the time for classes, requiring primary schools to begin no earlier than 8:20 a.m. and middle schools to start no sooner than 8 a.m., following the new rules on ease students' pressure. Photo: VCG

Students line up at the entrance of an elementary school with their parents to get registered for the fall semester in Hefei, East China’s Anhui province, on Saturday. Photo: VCG