Chinese authorities, committed to a zero-Covid policy, have been battling outbreaks in Beijing and Shanghai in recent weeks - Copyright AFP Sameer Al-DOUMY Most children in Beijing will not return to school next week as originally planned, Chinese officials said on Saturday, after an emerging Covid-19 outbreak prompted authorities to partly reverse a decision to resume in-person teaching. China is the last major economy still committed to a zero-Covid strategy, stamping out new cases with a combination of targeted lockdowns, mass testing and lengthy quarantines. But virus clusters in recent months have put that approach under strain. The megacity of...