Factbox: COVID-hit Chinese cities seek exit from painful lockdown

Plans by COVID-hit Chinese cities to exit or avoid lockdown are more fraught and uncertain than ever as the pursuit of zero cases grows more prolonged, taxing and complex, with the highly infectious Omicron variant demanding quicker and tougher steps. The lockdowns have led the World Health Organization chief to describe China's zero-COVID goal as unsustainable, but China says its approach will protect the lives of its people and economy in the longer run.