According to a new report by New York based China Labor Watch, approximately 3,000 workers at the Foxconn Zhengzhou factory have gone on strike off of the onsite quality control line, paralyzing multiple iPhone 5 production lines for the entire day. A combination of tightening quality control requirements coupled with mandatory shifts during the holiday reportedly led to violence and the strike. The strike echoes an event from last month, where 2,000 workers at a different factory staged a walkout and strike, shutting down production for a day.