UNITED NATIONS - China's UN ambassador, Zhang Jun, said on Thursday Beijing was assessing the World Health Organization's declaration that the coronavirus outbreak was a global emergency. 'We are still at a very critical stage in fighting the coronavirus. International solidarity is extremely important and for that purpose all countries should behave in a ... responsible manner,' Zhang said. 'While we understand the concerns of other countries, we should also listen to the advice of WHO director-general ... He said he had full confidence in China's efforts,' Zhang said. He said it was important to avoid 'overreactions which may result in spill over negative effects.'