First, the conditions for the designated defense of criminal case protest: the judgment or ruling of first instance is indeed wrong; It is really necessary to protest. In any of the following circumstances, it shall be deemed necessary to protest and lodge a protest according to law: taking the evidence collected by the people's court on its own as the basis for the judgment, and there is no proof of the trial, which leads to the wrong judgment. 2. Article 232 of the Criminal Procedure Law stipulates that local people's procuratorates at all levels shall lodge a protest against the judgment or ruling of first instance of the people's court at the same level through the people's court that originally tried the case, and send a copy of the protest to the people's procuratorate at the next higher level. The people's court that originally tried the case shall transfer the protest together with the case file and evidence to the people's court at the next higher level and send a copy of the protest to the parties. If the people's procuratorate at a higher level thinks that the protest is improper, it may withdraw the protest from the people's court at the same level and notify the people's procuratorate at a lower level.
Legal objectivity:
The Supreme People's Court on the implementation of the "People's Republic of China (PRC) Criminal Procedure Law"
Article 36
In any of the following circumstances, the people's court shall appoint a defender for the defendant:
People who are blind, deaf, dumb or have limited capacity;
(two) minors under the age of eighteen at the time of hearing;
(3) Persons who may be sentenced to death.