The defendant's lawyer (agent) can ask questions to the plaintiff. Whether questions will be asked is decided by the defendant's lawyer based on the actual situation, and questions must be approved by the court. The defendant's lawyer should ask the plaintiff about the facts of the case, which is part of the court investigation, so it should be conducted during the court investigation stage, usually at the end of the court investigation stage and before the court debate. Since the defendant's lawyer is asking questions about the facts of the case, the plaintiff, as a party, can answer truthfully. If you really don’t know or don’t know, you can directly answer “don’t know” or “don’t know”. If it is not relevant to the case, you can refuse to answer. Since the defendant's lawyer can ask questions to the plaintiff, the plaintiff (lawyer) can also ask questions to the defendant.
The statements of the defendant and the plaintiff are the same. my country's Criminal Procedure Law stipulates that, Article 141, court debates shall be conducted in the following order: the plaintiff and his agent ad litem speak, the defendant and his agent ad litem respond, the third party and his agent ad litem speak or respond, and each other debate. When the court debate ends, the presiding judge shall solicit the final opinions of all parties in the order of the plaintiff, defendant, and third party.