legal ground
Article 76 of the Interpretation of the Criminal Procedure Law of People's Republic of China (PRC) stipulates that in any of the following circumstances, witness testimony shall not be used as the basis for finalizing the case:
The questioning of witnesses is not conducted alone;
(2) The written testimony has not been checked and confirmed by the witness;
(3) The deaf-mute should be required to provide someone who is familiar with deaf-mute gestures, but he has not provided them;
(four) questioning witnesses who are not familiar with the local common language and writing, and failing to provide translators.