Larry Williams Drive

Shanghai will carry out Covid-19 testing on more than half of its 25 million residents this weekend, fueling fears of a return to more stringent restrictions just days after the financial hub emerged from two months of painful lockdown.The mass testing announcements sparked fears of a return to stringent, prolonged lockdown among Shanghai residents, many of whom had been confined to their homes for two months or more since March.Those fears have triggered panic buying. On Thursday, Shanghai residents rushed to supermarkets to stock up on food and other daily necessities, forming long lines at checkouts and leaving shelves empty, according to photos and videos that circulated on social media.At least seven of the city's 16 districts, with a combined population of 15 million people, will roll out mass testing over the weekend, Zhao Dandan, deputy head of the Shanghai Municipal Health Commission, said at a news conference Thursday. The districts include Shanghai's most populated areas and busy business hubs, suc