UPDATE 2-Apple supplier Foxconn quadruples bonuses to staff hit by China COVID lockdown(Adds details on Zhengzhou campus)By Yimou Lee and Brenda GohNov 1 (Reuters) - Apple supplier Foxconn said on Tuesday 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 had no choice but to follow government instructions which had put workers in "miserable conditions", a person familiar with the situation on campus told Reuters, adding that the circumstances caught management by surprise.Foxconn has not disclosed whether any workers at the Zhengzhou site had been diagnosed with COVID-19 but the executive told the newspaper there had been no severe infections and the company had set up a team to transfer infected staff to quarantine.15,000 YUAN BONUSReuters reported on Monday, citing a source, that the production of iPhones in November could slump by as much as 30% at the plant due to the situation and that Foxconn was working to boost production at another factory in Shenzhen to make up for the shortfall."