Criminal investigation and economic investigation are a division of labor within the public security organs. The criminal investigation, economic investigation, and public security jurisdiction cases of the Public Security Bureau are different. The Criminal Investigation Brigade is a permanent agency of the local public security department, responsible for local criminal investigation work and keeping track of criminal crime trends. Economic investigation team, a specialized team for investigating economic crimes. The criminal police team in a broad sense includes the criminal investigation team and the anti-narcotics team. The full name of the Criminal Investigation Team is the Criminal Investigation Brigade. It is a permanent agency of the county-level public security department and is responsible for local criminal investigation work. After accepting an economic criminal case, the economic investigation department will start the case filing review as soon as possible. Generally, within 7 working days, a decision will be made on whether to file the case or not, and the parties will be notified. In case of difficult or major economic crime cases, the decision on whether to file the case can be extended for 30 to 60 working days, but it needs to be approved by the relevant leaders. If the review period is extended, the case-handling unit shall provide a good explanation to the person reporting the case.