San Zhan: China's «Three Warfares» Doctrine

In 2003, the Chinese Communist Party's Central Committee and the Central Military Commission approved an amendment to the People's Liberation Army's Political Work Regulations that formally introduced the concept of San Zhan (三战), the «three warfares»: public opinion warfare, psychological warfare and legal warfare. Two decades on, that scheme has become one of the key analytical lenses for understanding how China conceives strategic competition below the threshold of war — and one of the most cited, and sometimes most misread, references in Western literature on Chinese strategy.

What the three warfares are

The San Zhan scheme articulates three fields of non-kinetic action, designed to operate in coordination before, during and after a conflict:

• Public opinion warfare (舆论战, yulun zhan): shaping domestic and international public perception of a conflict, using state media, public diplomacy and, increasingly, digital platforms, to build internal support and isolate the adversary.
• Psychological warfare (心理战, xinli zhan): degrading the adversary's will to fight while sustaining one's own, through deterrence, shows of force, targeted propaganda and deception operations.
• Legal warfare (法律战, falü zhan): using international and national law — and its interested interpretation — to legitimise one's own actions, delegitimise the adversary's and narrow their options. In the West this is known as lawfare.

The underlying logic is that of the classical Chinese strategic tradition: Sun Tzu's ideal of winning without fighting a battle. The three warfares seek to create favourable conditions — domestic support, international isolation of the adversary, legal cover — so that, if the military clash comes, it is already half won; or better still, so that it need not be fought at all.

The institutional origin: the PLA's political work

Unlike the West, where influence is spread across diplomacy, media and the military, in China the three warfares are an organic competence of the People's Liberation Army through its political work system. The PLA's General Political Department — reorganised in 2016 as the Political Work Department of the Central Military Commission — is the body the specialist literature (Stokes and Hsiao, Project 2049) identifies as the centre of «political warfare with Chinese characteristics»: an apparatus combining internal ideological control, external propaganda and psychological warfare.

This integration is the key structural difference: while in democracies information operations are a legally bounded military capability separate from state propaganda, in the Chinese system they form part of a party-army-state continuum that does not distinguish so clearly between public communication, covert influence and military operations.

Legal warfare: the least understood front

Of the three, legal warfare has drawn the most attention from Western analysts. Dean Cheng defined it as the instrumental use of legal norms to gain strategic advantage: invoking the law of the sea to claim the South China Sea, arguing that one's own actions are defensive and others' aggressive, or using selective adherence to treaties as a tool of coercion. The most cited examples are the construction of artificial islands in the South China Sea — accompanied by systematic legal argumentation — and the rejection of the 2016 arbitral award that ruled against Chinese claims, to which Beijing responded with a legal and public-opinion campaign to delegitimise it.

What the West observes, and what the debate is

The Pentagon's annual reports on Chinese military power have cited the three warfares since 2011 as a central part of PLA strategy, and analysts such as Elsa Kania have documented their evolution towards the cognitive domain: the idea that artificial intelligence and mass data will allow operating directly on the adversary's perception and decision-making.

Two cautions flagged by the academic literature itself are worth keeping. First: San Zhan is a doctrine, not a magic wand; the distance between concept and real execution capability is considerable, and Chinese propaganda has shown notorious clumsiness with Western audiences. Second: there is an analytical risk of reading every Chinese action — a news item, a lawsuit, a tweet — as the manifestation of a coordinated master plan, when Chinese bureaucratic reality is as fragmented as any other. The doctrine is real; the omnipotence sometimes attributed to it is not.