down more than 3 million people in one city. what is going on there? >> reporter: yeah. well, you have thailand and australia opening up. china has indicated that it is going to maintain its zero tolerance approach to covid, which is very strict lockdowns in any community where covid tests are -- covid cases are detected. so with the southern city of baise is the latest to have a couple dozen confirmed cases and on monday the city locking down strictly. everything has to be closed. you're not allowed to leave your house except to perhaps get groceries or mandatory covid test. nearby cities cutting off bus access to this city. and a chief epidemiologist at china's center for disease control tells the state-owned global paper china is going to stick to this. it is the best approach that the national government has to dealing with the pandemic, which i might add, was first detected