Seventeen million people in the Chinese tech hub of Shenzhen began their first full day under lockdown Monday, as a key factory making iPhones closed and restrictions spread across Shanghai and other major cities in an effort to extinguish the biggest-ever threat to the nation's zero-tolerance Covid strategy.
The southern city of Shenzhen took the measures on Sunday as authorities battled an Omicron flare-up in factories and neighbourhoods linked to nearby Hong Kong, which is recording scores of daily deaths as the virus runs rampant.
