【明報專訊】A new wave of COVID-19 cases originating from Nanjing Lukou International Airport has spread to 15 provinces and created multiple chains of transmission. Though the aggregate number of cases currently stands at around 300, the state is on its guard. Not only has it taken all kinds of pre-formulated measures to deal with the cases, but it has stepped up efforts to close off tourist attractions and prevent people from leaving the city where they are located.