They said that from 5 January all air passengers aged two and older will require a negative result from a test no more than two days before departure from China, Hong Kong or Macao.Read more:Zero-COVID U-turn means infection rate will be shrouded in secrecyExclusive: Doctors describe chaos in China's hospitalsZero-COVID U-turn means infection rate will be shrouded in secrecyExclusive: Doctors describe chaos in China's hospitalsChina's rolling back of some of the world's strictest anti-virus controls comes as President Xi Jinping's government tries to reverse an economic slump.Business groups have warned global companies were shifting investment away from China because foreign executives were blocked from visiting.Tesla shares fell 11.4% on the S&P 500 on Tuesday after the electric vehicle maker temporarily suspended production at a factory in Shanghai and several stock indexes traded lower as hopes for an economic rebound were tempered by near-term worries over rising cases in China.Hong Kong's chief executive John Lee also said close contacts of COVID patients will not have to quarantine and group gatherings will be allowed in public places."