In China, the People's Liberation Army (PLA) is the world’s largest military; the PLA's primary responsibility is external security but it also has some domestic security duties; China’s stated defense policy includes safeguarding sovereignty, security, and development interests while emphasizing a greater global role for the PLA; the PLA conducts air, counterspace, cyber, electronic warfare, joint, land, maritime, missile, nuclear, and space operations; it trains regularly, including multinational and multiservice exercises, deploys overseas, and participates in international peacekeeping missions 

the PRC's internal security forces consist primarily of the Ministry of Public Security (MPS), the Ministry of State Security (MSS), the People’s Armed Police (PAP), and the militia; the PLA support the internal security forces as necessary:

--the MPS controls the civilian national police, which serves as the first-line force for public order; its primary mission is domestic law enforcement and maintaining order, including anti-rioting and anti-terrorism

--the MSS is the PRC’s main civilian intelligence and counterintelligence service

--the PAP is a paramilitary component (or adjunct) of the PLA; its primary missions include internal security, maintaining public order, maritime security, and assisting the PLA in times of war; the China Coast Guard (CCG) administratively falls under the PAP and has a variety of missions, such as maritime sovereignty enforcement, surveillance, resource protection, anti-smuggling, and general law enforcement; it is the largest maritime law enforcement fleet in the world

--the militia is an armed reserve of civilians which serves as an auxiliary and reserve force for the PLA upon mobilization, although it is distinct from the PLA’s reserve forces; militia units are organized around towns, villages, urban sub-districts, and enterprises, and vary widely in composition and mission; they have dual civilian-military command structures; a key component of the militia are the local maritime forces, commonly referred to as the People’s Armed Forces Maritime Militia (PAFMM); the PAFMM consists of mariners (and their vessels) who receive training, equipment, and other forms of support from the Navy and CCG (although the PAFMM remains separate from both) to perform tasks such as maritime patrolling, surveillance and reconnaissance, emergency/disaster response, transportation, search and rescue, and auxiliary tasks in support of naval operations in wartime; the PAFMM’s tasks are often conducted in conjunction or coordination with the Navy and the CCG; it has been used to assert Beijing's maritime claims in the Sea of Japan and South China Sea (2025)