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China’s defense paradox: How active defense and advanced technology fuel the global security dilemma

In Brief

  • China’s military posture balances its official doctrine of self-defense with an accelerated modernization effort aimed at mastering 'informationized' and 'intelligent' warfare.
  • The strategy of 'active defense,' rooted in classical theory, permits military actions that appear offensive (like striking an aggressor's weak points) to be strategically categorized as legitimate national defense.
  • Modern military technology is inherently dual-use; systems like long-range sensors and precision-strike weapons make it virtually impossible to distinguish between defensive and offensive intent.
  • This defensive modernization triggers the classic security dilemma, where China’s efforts to overcome its 'technological generation gap' are perceived as severe threats by rivals, perpetuating a competitive arms cycle.

A central paradox defines China's contemporary military posture: a foundational doctrine rooted in self-defense and non-aggression coexists with an accelerated, large-scale modernization program aimed at mastering futuristic forms of warfare [1, 2]. This national effort to enhance military capabilities through science, technology, and talent development raises fundamental questions about the nature of 'defense' in an age of intense global competition . The pursuit of advanced military power, even when framed as a defensive measure, invariably fuels a cycle of international distrust, reflecting a global dilemma where one nation's security preparations are perceived as a threat by others [3, 4].

This tension is particularly striking when viewed against historical interpretations of Chinese strategic culture. Observers have previously characterized the national outlook as deeply pacifistic, prioritizing wisdom over military strength [5, 6]. However, current official documents express an urgent need to close a 'technological generation gap' and prepare for 'informationized' and 'intelligent' warfare . This strategic shift is driven by a security landscape in which external powers are seen as exerting 'relentless pressures' and interfering in what Beijing considers its internal sovereign affairs, thereby necessitating a more robust and technologically sophisticated defensive capability [7, 8, 9].

The Doctrine of 'Active Defense'

Classical military theory provides a crucial framework for understanding China's strategic posture. It distinguishes between a purely passive defense, often deemed 'pernicious,' and a more effective 'active defense' [10]. This latter concept, sometimes termed 'defensive-offensive,' entails more than simply weathering an attack; it involves proactively seizing opportunities to strike an aggressor's weak points and retake the initiative [11]. Such a doctrine allows for a broad range of military actions, which may appear offensive in isolation, to be strategically categorized as legitimate components of a national defense.

China has historically framed its military conduct within this defensive paradigm. During the 1958 Taiwan Strait Crisis, for example, official communications asserted that the situation was an 'internal Chinese matter' and characterized the presence of the United States as an 'invasion and occupation' [12]. From this perspective, any military action undertaken by the People's Republic would be a legitimate act of restoring sovereignty, consistent with the principle that armed force is justified exclusively for self-defense [13]. This rhetorical and strategic framing casts China as a respondent to foreign aggression rather than an initiator of conflict.

However, this self-perception of defensive intent exists within a deeply skeptical international system. The claim that armaments are acquired solely for defense is a common refrain among great powers, yet it frequently fails to reassure rivals . Instead, it can trigger a security dilemma, where the defensive buildup of one nation is interpreted as a latent threat by others, compelling them to increase their own military strength . This escalating cycle of preparedness, fueled by mutual distrust, can itself become the greatest threat to peace, creating a world where all nations are perpetually armed for a war none claim to want [14, 15].

The Imperative of Technological Modernization

China's commitment to military modernization is codified in its national laws, which mandate strengthening the armed forces through dedicated advancements in science and technology . This is not a gradual evolution but a determined push to master emerging forms of conflict, driven by a stated sense of urgency to overcome existing shortcomings in mechanization and to prepare for an era of 'informationized' and 'intelligent' warfare . The objective is to achieve a qualitative leap in military capability, transforming the People's Liberation Army into a force capable of competing on a technologically advanced battlefield.

This technological drive is a direct response to the global strategic environment. The proliferation of long-range, precision, intelligent, and unmanned weapons systems is a defining trend in modern military affairs . For China to secure its interests, it must not only acquire these technologies but also develop the doctrines and personnel to employ them effectively. This logic aligns with a core tenet of modern deterrence theory, shared by other major powers, which posits that the likelihood of an attack is significantly reduced by the certainty of an ever-ready and technologically sophisticated defense [16, 17].

A fundamental ambiguity lies at the heart of this technological pursuit. The very systems that enable a robust modern defense—such as global positioning, long-range surveillance platforms, and intelligence-led planning for deep operations—are inherently dual-use [18, 19]. These capabilities are as essential for projecting power far beyond a nation's borders as they are for protecting them. The increasing complexity of modern military technology makes it nearly impossible for outside observers to definitively separate defensive modernization from the build-up of offensive potential, as the same tools serve both functions [20].

Global Ambition and Geopolitical Realities

China's military development is inextricably linked to its geopolitical context and its rivalry with the United States. Official Chinese statements have historically identified 'American imperialists' as a 'common enemy' and framed the U.S. military presence in the Asia-Pacific as an illegitimate intrusion [21]. This perspective is a direct counterpoint to long-held American strategic concerns regarding the 'relentless pressures of the Chinese Communists' on regional stability and security .

The ambition to enforce a regional sphere of influence, encapsulated in the assertion that the 'west Pacific belongs to the people in this region' , requires a military capable of deterring or defeating the established power in the area, the United States. This goal necessitates the development of advanced anti-access/area-denial capabilities and power projection platforms that can operate far from China's shores. In pursuing this, China is effectively challenging the existing international order, which has long been underpinned by the organized military power of established states [22].

This strategic direction appears to mark a significant evolution from the pacifistic traditions that some observers have historically associated with Chinese culture, where wisdom was held to be more valuable than military might . The current emphasis on building a powerful modern military aligns more closely with the Western realist tradition, which holds that national strength is the surest guarantor of peace and security [23]. This embrace of military power as a central instrument of statecraft creates a profound tension with China's officially articulated identity as a peaceful, defensive-oriented nation.

China's pursuit of comprehensive military modernization is a logical and internally consistent response to its strategic objectives, the perceived security environment, and the relentless pace of technological change in warfare . However, this very pursuit places its foundational doctrine of 'active defense' and peaceful intent under considerable strain. The capabilities required for a credible defense in the 21st century—including long-range sensors, precision-strike weapons, and advanced command and control networks—are functionally indistinguishable from those required for offensive operations and regional power projection .

Ultimately, China's situation is a powerful illustration of the enduring security dilemma in international relations . As Beijing takes steps to secure itself against perceived technological inferiority and external threats , these actions are inevitably viewed with alarm by its competitors, fueling the very military competition it ostensibly seeks to manage. In this context, the distinction between 'defensive' and 'offensive' modernization becomes blurred, residing less in the technology itself and more in the strategic intent behind its development—an intent that remains a subject of intense global scrutiny and debate [24].