Which department should I look for in arrears of wages for migrant workers?

The easiest way is to complain by phone to the local labor law enforcement supervision brigade, which will supervise and inspect the employer according to the Labor Security Supervision Regulations and order it to pay the arrears of wages. According to Article 30 of the Labor Contract Law, if the employer is in arrears or fails to pay the labor remuneration in full, the employee may apply to the local people's court for a payment order according to law, and the people's court shall issue a payment order according to law.

The most effective way is to apply for labor arbitration directly to the local labor administrative department (no charge, no lawyer) and claim compensation from the unit through the award issued by labor arbitration. If you don't pay compensation, you can apply to the court for enforcement. If the labor arbitration is not accepted or the arbitration is unfair, you can also bring a civil lawsuit to the court within 15 days and execute it directly through the court's judgment.

While claiming wages through the above channels, you can also ask the unit to pay you extra compensation at a rate of more than 50% 100% of the payable amount according to Article 85 of the Labor Contract Law.