Depends on whether your trademark infringement case is a civil or criminal case.

If it is a civil case, according to the "Civil Procedure Law"

Article 149 of the trial limit provisions

The people's court shall apply ordinary procedures to the case , should be concluded within six months from the date of filing the case. If there are special circumstances that require an extension, it can be extended for six months with the approval of the president of this court; if an extension is still needed, it must be submitted to the superior people's court for approval.

If it is a criminal case, according to the "Criminal Procedure Law of the People's Republic of China"

Article 208 of the people's court hearing a public prosecution case shall wait two days after accepting the case. Sentencing shall be pronounced within three months, and shall not exceed three months at the latest. For cases in which the death penalty may be imposed or cases with attached civil litigation, as well as any of the circumstances specified in Article 158 of this Law, an extension of three months may be granted with the approval of the people's court at the next higher level; an extension may be required due to special circumstances. Yes, please submit to the Supreme People's Court for approval.