What are the admissibility rules of witness testimony? Is it mandatory not to testify?

The admissibility rules of witness testimony are as follows:

(A) opinion evidence rules

When marking the paper, it was found that the witness testimony was speculative and critical, and the evidence could not be used as the basis for deciding the case.

(2) the rule of evidence capacity

The rule of evidence ability mainly refers to whether the age, cognitive level, memory ability and expression ability of the witness and physical and mental state affect the testimony. This is at the time of testimony.

Testimonies provided by witnesses who are obviously drunk, poisoned by narcotic drugs or drugged by psychotropic drugs, so that they cannot be correctly expressed, cannot be used as evidence.

(3) the rule of legality of evidence

The procedures and methods for obtaining witness testimony shall comply with laws and relevant regulations, and the witness testimony obtained by the following methods shall not be used as the basis for finalizing the case:

Witness testimony obtained by illegal means such as violence, threat, deception or inducement;

Testimony obtained by questioning witnesses who have no personal behavior;

Written testimony without verification, signature (seal) or fingerprinting by witnesses;

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