There is no need for a citywide lockdown in Shanghai at present, despite the surging number of COVID-19 cases reported recently, according to a senior local government official.Based on the current pandemic situation, Shanghai will designate several key areas according to the regional risk levels and conduct nucleic acid testing block by block, Gu Honghui, the city's deputy secretary general, said on Tuesday.Outside the key areas, companies are encouraged to stagger their work hours and allow employees to work from home to reduce mobility.