Ptu is a police mobile unit. The police is an armed security administrative force established by the ruling class to maintain the ruling order, and it is one of the important tools of class dictatorship. According to different tasks, different countries have different types of police, such as household registration police, traffic police, criminal police, judicial police and public security police. As a profession, the police are mainly responsible for enforcing the law, maintaining public safety and protecting life and property. In most democratic countries (regions), the police and the army are separated and not subordinate to each other. Armed police, the Chinese people's armed police force, implements the national military service system, which belongs to the nature of the police force, does not belong to the police category, and does not have the traditional police power. The Armed Police Force is an integral part of People's Republic of China (PRC)'s armed forces. It is a force entrusted by the state to undertake security tasks and is led by the Central Military Commission.

The army has three characteristics: one is a beret, the other is to wear military boots (pants are stuck in the boots), and the third is that the beret has a lightning badge under its badge.

In use, PTU usually patrols the streets under the command of the company, usually in groups of four people. (Basically, the duty officer in the police district does not consider PTU when arranging patrol police officers, because they are extra police officers). Since the general patrolmen are in groups of 1 to 2 people, PTU with 4 people working together has greater deterrence.

If there is a crowd gathering, parade, etc. PTU is generally responsible for crowd control. Theoretically, PTU can also be used to suppress riots (fortunately, PTU has been used to suppress riots in Vietnam for 67 years).

In case of major events, such as gun battles or searching pornographic places, the criminal department can mobilize PTU to assist in searching the evidence at the scene and maintain order. Simply put, PTU can provide police force for all departments in need without affecting the police force in each district.

It is worth mentioning that SDU is preparing to become a part of PTU. In addition, to apply for SDU or ASU (Airport Special Police), you must have PTU training experience. The PTU SDU Special Duty Team is a specially trained special police team. Responsible for dealing with criminals with weapons of mass destruction. Because the team emblem is a tiger with wings and fierce appearance, it is called "Flying Tigers" and often becomes a hero in Hong Kong movies.

G4 VIP Protection Group is responsible for protecting senior government officials and foreign dignitaries visiting Hong Kong.

Airport special police, responsible for the security of Hong Kong International Airport, equipped with MP5 submachine guns like the Flying Tigers.

As for patrol (PC), it is the patrol personnel of the division.

EU (Emergency Unit) is the mounted police unit of the General Division, with a car of five people, including an MP5 and an M870, as well as body armor, first-aid tools, anti-riot equipment, and even body armor against knives.

Because of their great motivation, they have their own share of almost everything.

It is worth noting that many military departments also wear berets outside PTU.

Including the Marine Police, the European Union, the New Territories North Rapid Response Force, and the Ministry of Communications changed from a big hat to a beret for a while, but their hat badges would not have lightning.

In addition, at present, when the police try on new uniforms, the European Union and the Ministry of Communications will switch to baseball caps.