It is illegal for training institutions to deduct 3000 yuan a day from classes. It is illegal for training institutions to take time off to deduct classes. In case of dispute, you can directly apply to the Labor Arbitration Commission for arbitration. According to Article 79 of the Labor Law of People's Republic of China (PRC), after a labor dispute occurs, the parties may apply to the Labor Dispute Mediation Committee of the unit for mediation. If mediation fails and one party requests arbitration, it may apply to the Labor Dispute Arbitration Committee for arbitration. One party may also directly apply to the Labor Dispute Arbitration Commission for arbitration. If you are not satisfied with the arbitration, you can bring a lawsuit to the people's court.