China's much-proclaimed 'ironclad friendship' with Cambodia is ultimately subordinate to Beijing's national interests, according to an analysis published in Eurasia Review — a finding that carries stark implications for Phnom Penh's foreign policy calculus. The report argues that Cambodia should treat Chinese friendship as a diplomatic instrument rather than a security guarantee against territorial loss.

The Border Crisis That Tested the Friendship

The stress test arrived when artillery, rockets, and airstrikes erupted along the Cambodia-Thailand border on 24 July 2024. Hostilities intensified when fighting resumed on 27 December 2024. Despite Cambodia's long-standing alignment with Beijing, China neither endorsed Cambodia's territorial claims nor condemned Thailand's military actions.

Instead, the Chinese Foreign Ministry adopted a carefully neutral position. In a statement dated 27 July 2025, a ministry spokesperson said: 'Cambodia and Thailand are and will always be each other's neighbours. Both countries are China's friends and neighbours as well. Maintaining good-neighbourliness and mutual trust and properly managing differences serves the two countries' fundamental and long-term interests, and the region's peace and stability.'

What Beijing's Neutrality Signals

The spokesperson expressed that China was 'saddened by the casualties inflicted on both sides' and called on both nations to 'exercise calm and restraint, reach a ceasefire as soon as possible and settle differences peacefully through dialogue and consultation.' Both Cambodia and Thailand were described as 'important members of ASEAN' — a framing that placed them on equal diplomatic footing in Beijing's eyes.

This symmetry was revealing. Analysts note that China maintained active political and military ties with both countries simultaneously, making it structurally unwilling to favour Phnom Penh at Bangkok's expense.

Why Thailand Outweighed Cambodia in Beijing's Calculus

Channtha So, a PhD Candidate in International Relations at The University of Cambodia, argued in the Eurasia Review report that the asymmetry is rooted in hard strategic realities. 'Beijing's diplomatic rhetoric of friendship is subordinate to the national interest. Cambodia is still valuable as it provides political alignment, strategic access, and diplomatic support. Thailand, however, is more economically significant, more influential in mainland Southeast Asia and has a significant defence relationship with China. Cambodia's rhetorical status was not enough to secure exceptional Chinese support when the relationships came into tension,' So wrote.

In other words, Thailand's commercial scale, regional influence, and defence ties with China made it a higher-cost relationship to jeopardise — one that Beijing was unwilling to sacrifice for Cambodia's territorial interests.

The Limits of an 'Ironclad' Pledge

The report acknowledges that China did not abandon Cambodia entirely — political and military cooperation continued. But the episode exposed the ceiling of what Beijing's friendship guarantee actually covers. According to Channtha So: 'Beijing's subsequent attempts to pacify Cambodia do not overturn this assumption because it maintained a beneficial, but highly asymmetric relationship with Cambodia without limiting China's strategic options.'

The analyst's prescription for Phnom Penh is blunt: 'Strategic autonomy necessitates Phnom Penh to distinguish between praise and obligation, minimise dependence and establish alternative options that are not based on the affection of another state.' This comes amid growing scrutiny across Southeast Asia of how smaller nations navigate their relationships with major powers, particularly as China deepens its footprint in the region.

What This Means for Cambodia's Foreign Policy

The border conflict and China's response to it have prompted a broader debate about the nature of asymmetric alliances in Southeast Asia. For Cambodia, which has historically leaned heavily on Beijing for diplomatic cover and economic investment, the episode underscores the risks of over-reliance on a single patron. Analysts suggest that Phnom Penh may need to diversify its diplomatic portfolio — engaging more actively with ASEAN partners and other regional stakeholders — to build genuine strategic resilience. How Cambodia responds to this lesson will likely shape its foreign policy orientation for years to come.