Information about the hearing of criminal cases cannot be accurately known. The parties concerned should pay attention to the announcement of the court or go to the court for inquiry. Because not all cases belong to the scope of public hearing. According to Articl《刑事诉讼法》, the trial of cases of first instance by the court shall be conducted in public. However, cases involving state secrets or personal privacy are not heard in public; Cases involving trade secrets may be heard in private if the parties apply for it. If a case is not heard in public, the reasons for not hearing in public shall be announced in court. At the same time, according to the provisions of Articl《刑事诉讼法》, after the court decides to hold a trial, it shall determine the members of the collegial panel, and send a copy of the indictment of the procuratorate to the defendant and his defender no later than ten days before the trial. Before the court session, the judges can call the convener, the parties, the defenders and the agents ad litem to know the situation and listen to opinions on issues related to the trial, such as withdrawal, list of witnesses appearing in court, exclusion of illegal evidence, etc. After the court decides the date of the hearing, it shall notify the procuratorate of the time and place of the hearing, summon the parties, and notify the defenders, agents ad litem, witnesses, expert witnesses and translators. Summons and notices shall be served at least three days before the hearing. For a public trial case, the cause of action, the name of the defendant, the time and place of the trial shall be announced three days before the trial. The above-mentioned activities shall be written in a transcript, which shall be signed by the judges and clerks.