In the face of the rules and regulations proposed by the unit, the workers refute the rules and regulations without legal procedures, especially without informing the workers, and the contents of the rules and regulations are illegal, which is an effective response to the evidence presented by the unit. According to Article 70 (3) of the Several Provisions of the Supreme People's Court on Evidence in Civil Proceedings, if one party raises an objection to the audio-visual material or a copy that is unquestionable and has been obtained by legal means and is supported by other evidence, but has no evidence to the contrary, the people's court shall confirm its probative power. The rebuttal to the evidence of the unit: (1) The legality and effectiveness of the rules and regulations of the unit: The rules and regulations of the unit play an important role in regulating the behavior of employees, punishing employees, unilaterally terminating labor contracts and other behaviors. Whether the rules and regulations are legal and effective directly determines whether the behavior of the unit is legal or not. For the evidence forged by the unit, the unit may even forge the worker's signature. In this regard, the laborer should firmly put forward the request for appraisal. Of course, it may take time and pay a lot of appraisal fees in advance, but if the appraisal results show that the evidence is forged, the unit should bear the consequences of losing the lawsuit and bear the appraisal fees. Extended information: Article 19 The labor dispute arbitration committee is composed of representatives of the labor administrative department, representatives of the trade union and representatives of the enterprise. The members of the labor dispute arbitration committee shall be an odd number. What duties should labor dispute arbitration committees perform according to law? （1） Appoint and dismiss full-time or part-time arbitrators; （2） Accepting labor dispute cases; （3） Discuss major or difficult labor dispute cases; （4） Supervise arbitration activities. The labor dispute arbitration commission shall have an office to handle the daily work of the labor dispute arbitration commission. Article 21 The labor dispute arbitration commission shall be responsible for the jurisdiction of the labor disputes that occur in its area. Labor disputes shall be under the jurisdiction of the labor dispute arbitration committee in the place where the labor contract is performed or where the employer is located. If both parties apply for arbitration to the labor dispute arbitration committee in the place where the labor contract is performed and the place where the employer is located, the labor dispute arbitration committee in the place where the labor contract is performed shall have jurisdiction. Article 22 Labourers and employers involved in labor disputes shall be the parties to labor dispute arbitration cases. In case of labor dispute between the labor dispatching unit or the employing unit and the laborer, the labor dispatching unit and the employing unit shall be the joint parties. Have you learned the above legal knowledge about the precautions and debate skills of labor arbitration hearings?