Protest refers to the litigation activities in which the people's procuratorate considers that the judgment or ruling made by the people's court is indeed wrong and submits a retrial request to the people's court according to law.
If the people's procuratorate finds that the legally effective judgment or ruling of the people's court violates the provisions of laws and regulations, it has the right to lodge a protest in accordance with the procedure of trial supervision. The Supreme People's Procuratorate lodged a protest with the people's court at the same level in accordance with the procedure of trial supervision against the civil and administrative judgments and rulings of the people's courts at all levels and the people's procuratorates at higher levels that are legally effective against the people's courts at lower levels. When the people's court at the same level retries, the people's procuratorate that lodged the protest shall send representatives to attend.
Protest is mainly divided into: appeal protest and retrial protest. The protest of the appeal trial procedure will make the judgment and ruling of the first instance unable to take legal effect; Criminal retrial protest (excluding civil and administrative litigation) does not cause the people's court to stop executing the original judgment or ruling during the retrial according to the trial supervision procedure.