Large-scale protests broke out at Foxconn’s vast iPhone factory in Zhengzhou, central China, images circulating on Weibo and Twitter appeared to show. Videos on Wednesday showed hundreds of workers marching on a road in daylight, with some being confronted by a row of riot police and people in hazmat suits. Some videos showed workers complaining about the food they had been provided while others said they had not been paid bonuses as promised. One clip take from a livestream showed dozens of workers at night shouting, “Defend our rights! Defend our rights!” as they confronted a row of police officers...