Zhou Hujun, one of thousands of shoe factory workers on strike in southern China, drove his motorbike to the local government's Social Security Department seeking answers. After a few minutes, he left clutching spreadsheets that just raised more questions.Zhou and other striking workers believe Yue Yuen Industrial Holdings, which owns the factory making footwear for Nike, Adidas and others, has for years underpaid into workers' social insurance accounts — government-mandated nest eggs for disability, unemployment and retirement.

Source - http://www.financialexpress.com