A sign is seen at the entrance of a SkyTrain station to remind people of the new face mask policy in Vancouver, British Columbia, Canada, on Aug. 24, 2020. Anyone on board a TransLink or British Columbia (BC) Transit bus, boat or train and passengers on board BC Ferries vessels are required to wear a face mask beginning Monday to help stop the spread of COVID-19. (Photo by Liang Sen/Xinhua)