The world's largest shoemaker caved in to some demands by striking workers…but the four-day labour stoppage…continued to brew…Yue Yuen Industrial Holdings, which makes shoes for Nike and Adidas, said it would increase employee benefit payments…The strike began after negotiations broke down over Yue Yuen's contribution to workers' social insurance…Employees renewed a strike…after learning that the company's contributions were below the legal minimum...Yue Yuen spokesman George Liu said some workers had given a "positive response" to a planned…increase in company payments to a social insurance system. Employees were expected to return to work or face action by the company, he said, without specifying possible actions or giving an estimate of the number of workers on strike…[Workers] said some 50,000 workers at seven Yue Yuen plants were on strike…[Several] were injured after clashing with police, with some needing hospital treatment…Most of the factories have been guarded by a large police presence…