Just a quick clarification. Everyone is talking about the CLA (Council of Labor Affairs, lǎowéihui). The CLA is not involved in this case. The CLA is a central government agency. It issues work permits to employers allowing them to hire foreigners.
However, when you have a labor dispute, you deal with your local county or city’s Department or Bureau of Labor (láogōngjú). All employees in a labor dispute go here, foreign or otherwise. While the local Dept. of Labor obviously works closely with the Council, they are not really subordinate agencies.