After reports of false results, Chinese Covid testing company investigated

A Covid-19 testing firm in Shanghai is being investigated by city officials after reports that residents were given false-positive results that landed them in harsh state quarantine. The city has been under lockdown for weeks as China enforces a zero-Covid policy through shutdowns, mass testing and tight restrictions on movement — with everyone who tests positive being sent to a government isolation centre, even those without symptoms. Numerous Shanghai residents wrote on the Twitter-like Weibo platform this week that they received false-positive results from Zhongke Runda, which operates three testing centres in the financial hub of 25 million. The group's…