Covid-19: French PM visits Lille

PARIS, Aug. 4, 2020 (Xinhua) -- French Prime Minister Jean Castex (C, front) visits Lille as mask-wearing becomes mandatory in the city center amid concerns about an increase in COVID-19 cases, northern France, Aug. 3, 2020. The French authorities have ordered people to wear face masks in outdoor public places in many major cities as the COVID-19 spread faster and the admission to intensive care units increased again after month-long decline.