Where can I appeal a criminal case?

The parties, their legal representatives and close relatives may appeal to the people's court or the people's procuratorate against the legally effective judgment or ruling, but they cannot stop the execution of the judgment or ruling.

legal ground

Criminal Procedure Law of the People's Republic of China

Article 252 The parties, their legal representatives and close relatives may appeal to the people's court or the people's procuratorate against a legally effective judgment or ruling, but the execution of the judgment or ruling shall not be suspended.