FILE PHOTO: People walk at the Ming Dynasty City Wall Relics Park, as Beijing issues orange alert for heavy air pollution, in Beijing, China October 31, 2023. REUTERS/Tingshu Wang/File Photo
FILE PHOTO: People walk at the Ming Dynasty City Wall Relics Park, as Beijing issues orange alert for heavy air pollution, in Beijing, China October 31, 2023. REUTERS/Tingshu Wang/File Photo