Cemeteries in Shanghai are hosting online memorial services to mourn the dead as the Qingming Festival nears in an effort to curb the spread of COVID-19.This year's Qingming Festival, a time traditional for Chinese people to pay respects to their ancestors, falls on April 5.During last year's Qingming tomb-sweeping peak season, Shanghai's 54 cemeteries and columbariums were visited by 3.43 million people.