SHANGHAI (Reuters) -The COVID-19-hit financial hub of Shanghai will start to allow more businesses in zero-COVID areas to resume normal operations from the beginning of June, a deputy mayor said on Thursday as the city looks forward to the end of lockdown. Shanghai, fighting China’s biggest ever coronavirus outbreak, has been steadily allowing more businesses to reopen and letting larger numbers of residents leave their homes for the first time in nearly seven weeks. The city was “striving to achieve a full resumption of work and production as soon as possible”, deputy mayor Zhang Wei told a m…