The plea of innocence shall be based on facts and based on the law. The defender's defense should be based on objective facts, and the guilty part should not be omitted. And the defense is that after objective analysis, there is relevant evidence to prove the offender's innocence, or there is no evidence, and the evidence is not enough to prove the offender's guilt; In addition, the defender's defense needs to be supported by legal basis.
 Legal basis:
 Article 6 of the Criminal Procedure Law
 In conducting criminal proceedings, the people's courts, the people's procuratorates and the public security organs must rely on the masses, take facts as the basis and the law as the criterion. All citizens are equal in the application of the law, and no privilege is allowed before the law.
 Article 37 of the Criminal Procedure Law
 The duty of the defender is to put forward the materials and opinions of the criminal suspect and the defendant who are innocent or less guilty or whose criminal responsibility is mitigated or exempted according to the facts and laws, and to safeguard the procedural rights and other legitimate rights and interests of the criminal suspect and the defendant.