Chinese paramilitary police and security officers wear face masks to protect against the spread of the new coronavirus as they stand guard outside an entrance to the Forbidden City in Beijing, Friday, May 1, 2020. The Forbidden City reopened beginning on Friday, China's May Day holiday, to limited visitors after being closed to the public for more than three months during the coronavirus outbreak. (AP Photo/Mark Schiefelbein)

中国准军事警察和安全人员戴着口罩在北京紫禁城入口