"On Weibo, a social-media site, some users worried about a return to the days of the Cultural Revolution, a decade of Maoist madness when neighbours, friends and even family members informed on each other" https://www.economist.com/china/2023/09/21/china-tells-its-citizens-to-be-on-the-lookout-for-spies

Original tweet: https://twitter.com/shashj/status/1704867667088191812