More than 2,000 tourists have become stranded in a resort town in southern China after authorities imposed a snap lockdown to curb a Covid flare-up, as the country’s stringent zero-Covid policy continues to upend businesses and daily life.More than 2,000 tourists have become stranded in a resort town in southern China after authorities imposed a snap lockdown to curb a Covid flare-up, as the country’s stringent zero-Covid policy continues to upend businesses and daily life.