To put it simply and clearly: The procuratorate is a judicial organ in our country. Its main functions are to prosecute criminal cases filed by the public security organs, investigate and file crimes of corruption and bribery by itself, and hold hearings in courts. At trial, appear in court to support the prosecution. It also has a supervisory function. The public security agency is an administrative agency that mainly handles some household registration and other information, and its most important function is to investigate cases. After the investigation is completed, the case will be submitted to the People's Procuratorate. The Industrial and Commercial Bureau is also an administrative agency and is mainly responsible for commercial taxation.