Pandemic lockdowns are expanding across China, including in a city where factory workers clashed this week with police, as the number of COVID-19 cases hits a daily record. Residents of eight districts of Zhengzhou, home to 6.6 million people, were told to stay home for five days beginning Thursday except to buy food or get medical treatment. Daily mass testing was ordered in what the city government called a "war of annihilation" against the virus. During clashes on Tuesday and Wednesday, Zhengzhou police beat workers protesting over a pay dispute at the biggest factory for Apple's iPhone, located in an...