Hundreds of millions of students across China have begun returning to the classroom, after education authorities hailed a “decisive victory” against the coronavirus.The Ministry of Education has given the go-ahead for all schools to reopen – except in Xinjiang – from Monday, saying the pandemic is under control and some 280 million students can begin the autumn semester on campus.In Xinjiang, however, students will begin the new school year online. The region has seen a fresh outbreak of cases…