Do the two lawyers in the criminal stage include trainee lawyers?

It is best to have two lawyers (or a trainee lawyer) to meet the criminal suspect in custody. To make a record, let the suspect sign and press the fingerprint. It is strictly forbidden to help criminal suspects collude with each other, not to pass notes and other information, not to let criminal suspects use lawyers' telephones to talk to the outside world, not to bring non-lawyers to meet, not to pass clues about meritorious service to criminal suspects, and not to guarantee the outcome of the case.