Political review of public institutions requires the signature of the director of the police station. According to the query of relevant information, the political review form is first made by the person in charge of administrative back office logging into the internal website of the national public security system to conduct relevant inquiries. Then the political review form is filled in based on the query results and handed over to the deputy leader in charge of administrative back office for signature. After the opinions are expressed, they must be signed by the director of the police station and finally stamped with the official seal of the police station to be valid.