Can lawyers communicate with judges after the criminal trial?

Of course. After the trial, the criminal defense lawyer shall feed back the case to the judge through legal channels. This is the basic work of criminal defense lawyers.

Legal basis:

Article 198 of the Criminal Procedure Law of People's Republic of China (PRC) During the court hearing, all facts and evidence related to conviction and sentencing shall be investigated and debated. With the permission of the presiding judge, the public prosecutor, the parties, defenders and agents ad litem may express their opinions on the evidence and the case, and may argue with each other. After the presiding judge announces the end of the debate, the defendant has the right to make a final statement.