US
China could face more than 630,000 infections a day if it dropped its zero-tolerance policies, say mathematicians
Development comes as country grapples with a rapidly ageing workforce and slowing economy
Afghanistan has been plunged into crisis by the abrupt end of billions of dollars in foreign assistance
Olympic body’s head faces criticism for not demanding guarantees over star’s freedom
Attacks reportedly target sensitive military departments
Foreign ministry spokesman says tennis star’s recent appearances are proof that she is safe
Chinese tennis star speaks to organisation chief Bach, wants privacy respected
Concern for missing tennis player Peng Shuai grows after her sexual assault allegation
Frequent Chinese and US military exercises in the region have raised fears of conflict
WTA chairman says email posted on Chinese media ‘raises concerns on player’s safety’