Nia police are subordinate to China People's Police, and are mainly responsible for entry and exit management, port certificate inspection and foreigners' residence management. Simply put, it is the police who are in charge of entry and exit work.

National immigration bureau

Coordinate the formulation and implementation of immigration policies, be responsible for entry and exit management, port certificate inspection and border people exchange management, be responsible for foreigners' stay and permanent residence management, refugee management and nationality management, take the lead in coordinating the management of non-foreigners and the repatriation of illegal immigrants, be responsible for China citizens' entry and exit services for personal reasons, and undertake international cooperation in the field of immigration.

The flag of the national immigration management team is dominated by national flag red and police blue. Red reflects the party's absolute and comprehensive leadership over the immigration management team, blue reflects the attributes of the people's police, and the main color of red and blue shows the political nature of the immigration management team's loyalty to the party, serving the people, just law enforcement and strict discipline.

In the center of the national flag, there is the entry-exit management sign of China, with the Great Wall pattern below, which symbolizes the firm determination, tenacious will and strong strength of the entry-exit management team to perform their duties according to law, safeguard national security and the stability of border crossings, and serve to ensure economic and social development.