Renewed fighting in the Cambodia conflict months after a peace accord ceremony has enabled China to take on a larger mediation role in Southeast Asia. This development highlights a broader regional shift, particularly in Thailand's diplomatic posture.

In October 2025, a peace accord ceremony took place in Malaysia where Thai Prime Minister Anutin Charnvirakul shook hands with U.S. President Donald Trump, while Cambodian Prime Minister Hun Manet observed. Despite this, hostilities resumed months later, creating an opening for China to increase its involvement in mediation efforts.

The ASEAN Regional Forum, which convenes 27 countries and territories and culminates a week of ASEAN-led foreign ministers' meetings every July, remains Asia's largest and longest-running forum for multilateral dialogue. The forum's activities underscore the complex diplomatic landscape in which these developments are unfolding.

This shift in mediation dynamics reflects evolving geopolitical influences in Southeast Asia, with China assuming a more prominent role amid ongoing regional tensions.

Source: Nikkei Asia

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