In theory, it is enough to state the facts clearly in court and submit sufficient evidence. The role of lawyers is mainly two. First, I know the law better, and I know whether your matter is legally reasonable or partially reasonable. If it is a complex case, we need to consider which legal relationship to sue from. But in fact, if the legal relationship is misunderstood, the judge will explain the reminder. That is, lawyers who collect evidence are experienced and know what evidence to collect and how to collect it. But if there is no such evidence at all and there is no reservation, then lawyers can't change it. As for the debate in court, it is actually more for the parties. Be reasonable, the judge is a professional, and he will try cases according to law. Your lawyer can't win your case with a few high-sounding words. Article 58 of the Civil Procedure Law If it is not prohibited by law, the parties and their legal representatives may entrust one or two persons as agents ad litem. Lawyers, close relatives of the parties, persons recommended by relevant social organizations or units and other citizens permitted by the people's courts may be entrusted as agents ad litem. A person who has been sentenced to punishment according to law or deprived of or restricted personal freedom shall not act as a defender. It can be seen from the above legal provisions that not only lawyers can act as agents or defenders of the parties, but also others can't participate in the litigation process as lawyers, especially in criminal cases. Others can't go to the procuratorate to obtain or copy or duplicate the relevant materials for prosecution, but lawyers can. It is more appropriate for lawyers to act as agents or defenders in litigation, because they need more legal knowledge about procedures and contents.

The parties have the right to entrust an agent, apply for withdrawal, collect and provide evidence, debate, request mediation, file an appeal and apply for enforcement. The parties may consult the relevant materials of this case and copy the relevant materials and legal documents of this case. The scope and methods of consulting and copying relevant materials in this case shall be stipulated by the Supreme People's Court. The parties must exercise their litigation rights in accordance with the law, abide by the litigation order, and perform legally effective judgments, rulings and conciliation statements.

Legal basis: Article 48 of the Civil Procedure Law of People's Republic of China (PRC). Citizens, legal persons and other organizations may be parties to civil litigation. A legal person shall file a lawsuit by its legal representative. Other organizations are sued by their principal responsible persons.