Although your friend's case has been brought to court for a month, as long as it does not exceed the time limit of three months, it does not exceed the time limit prescribed by law. If in doubt, you can consult your local lawyer or the court hearing the case in detail.
Attached to the relevant provisions of the Criminal Procedure Law:
Article 202 When trying a case of public prosecution, the people's court shall pronounce a judgment within two months after accepting it, and no later than three months. For a case that may be sentenced to death or an incidental civil lawsuit, if one of the circumstances stipulated in Article 156 of this Law occurs, it may be extended for three months with the approval of the people's court at the next higher level; Due to special circumstances need to be extended, it shall be submitted to the Supreme People's Court for approval.