A Chinese government trade union says it will mediate a labor dispute in which tens of thousands of workers have joined a massive strike against the world's largest shoemaker.

Guangdong Federation of Trade Unions said Friday that it had instructed its municipal branch in the southern city of Dongguan to find a resolution to the strike.

More than 30,000 workers in the 10 plants run by Taiwanese-owned Yue Yuen Industrial (Holdings) Ltd. have staged work stoppages this week to demand the company make social security contributions as required by Chinese law and meet other demands.

Yue Yuen makes shoes for companies including Nike and Adidas.