TwitterSocial media posts said the clashes took place on Tuesday night and were caused by a dispute over lockdown curbs.
China Dissent Monitor, run by U.S. government-funded Freedom House, estimated at least 27 demonstrations took place across China from Saturday to Monday.
In Zhengzhou, the site of a big Foxconn factory making Apple iPhones that has been the scene of worker unrest over Covid, officials announced the “orderly” resumption of businesses, including supermarkets, gyms and restaurants.
Data on Wednesday showed China’s manufacturing and services activity for November posting the lowest readings since Shanghai’s two-month lockdown began in April.
Chinese stocks were steady, with markets weighing endemic economic weakness against hopes that the public pressure could push China to eventually reopen.