Apple supplier Foxconn said it has quadrupled bonuses on offer for workers at its Zhengzhou plant in central China as it seeks to quell discontent over Covid curbs and retain staff at the giant iPhone manufacturing site. Daily bonuses for employees, who are part of a Foxconn unit responsible for making electronics including smartphones at the site, have been raised to 400 yuan ($55) a day for November from 100 yuan, according to the official WeChat account of Foxconn’s Zhengzhou plant. Foxconn, formally Hon Hai Precision Industry, is Apple’s biggest iPhone maker, producing 70% of iPhone shipments globally. It makes...