ASEAN and China Navigate Escalating South China Sea Tensions Amid Stalled Code Talks
The South China Sea remains a flashpoint between China and several Southeast Asian nations in 2026. China claims roughly ninety percent of the waterway under its historical nine-dash line doctrine, overlapping with exclusive economic zones of the Philippines, Vietnam, Malaysia, Brunei, and Indonesia. A 2016 international tribunal rejected China's claims, but Beijing has not accepted the ruling. ASEAN and China have been negotiating a Code of Conduct since 2013 to manage disputes, with a target to finalize it by year-end 2026. However, major obstacles persist: disagreements over legal enforceability, geographic scope, and enforcement mechanisms. Maritime confrontations have intensified, with China and the Philippines clashing six times since October alone near Scarborough Shoal and Second Thomas Shoal. Vietnam has accelerated military infrastructure in the Spratlys, while China expanded coast guard deployments. The waterway handles approximately 40 percent of global maritime trade worth over three trillion dollars annually, making stability a global concern.
Key facts
- China claims approximately 90 percent of the South China Sea under its nine-dash line doctrine, rejected by a 2016 international tribunal
- China and the Philippines clashed six times between October 2-9, 2026, at Scarborough Shoal, Second Thomas Shoal, and Spratly Islands
- South China Sea maritime trade volume in 2026 estimated at 3.5 trillion dollars annually, or 40 percent of global maritime trade
- ASEAN-China Code of Conduct negotiations have reached approximately 70 percent agreement as of end-2025, with finalization targeted by December 2026
- Vietnam has accelerated infrastructure development on 21 features in Spratly Islands including military barracks, docks, and a 3.2-kilometer runway
- Philippines holds grounded military vessel BRP Sierra Madre on Second Thomas Shoal since 1999, located within Philippine exclusive economic zone per 2016 tribunal ruling
How different outlets framed it
Left-leaning coverage: Left-leaning outlets like Radio Free Asia highlight China's pattern of skirting international agreements and note that any Code of Conduct must include strong enforcement mechanisms to be effective. They emphasize the 2016 arbitral tribunal's legal authority and argue that China's nine-dash line claim represents a violation of established international law and maritime conventions that should be binding.
Right-leaning coverage: Right-leaning and Chinese state media outlets like Global Times argue that the Philippines is using dramatized rhetoric and sensationalized incidents to amplify tensions while negotiations are ongoing. They suggest Manila's frequent public statements about confrontations risk disrupting diplomatic efforts and that bilateral discussions, rather than multilateral ASEAN-wide approaches, are more practical for resolving specific disputes.
Limits of this briefing
Some regional perspectives, particularly from ASEAN nations with less direct South China Sea involvement such as Thailand and Cambodia, are underrepresented in English-language reporting. Additionally, China's official statements on the dispute primarily appear through state media outlets rather than independent domestic sources, limiting access to diverse Chinese viewpoints.
Sources
- Council on Foreign Relations: Territorial Disputes in the South China Sea Centre
- Radio Free Asia: ASEAN, China unlikely to finalize South China Sea Code of Conduct at upcoming summit Left
- Global Times: Philippines ramps up South China Sea rhetoric amid China-ASEAN talks, risks disrupting efforts to advance COC Right
- VOA News: China-Philippines War of Words Raises South China Sea Tensions Centre
- Asia Times: The South China Sea consensus no ASEAN chair can move Centre