China's Territorial Claims Emerge as Boardroom Concern for Thai Businesses

For decades, Chinese territorial claims in the South China Sea, over Taiwan, and along the disputed India-China frontier were treated by most Southeast Asian executives as a distant security matter, relevant to diplomats and defence ministries but not to quarterly planning. That assumption is eroding. As shipping routes tighten, insurance premiums shift, and supply chains reroute around flashpoints, what was once background geopolitics is now showing up directly in cost structures for firms trading through the region, including many with operations tied to Thailand’s trade and export sector. China’s most consequential claim for Southeast Asian business is the so-called nine-dash line, which asserts sweeping jurisdiction over most of the South China Sea, overlapping with waters claimed by the Philippines, Vietnam, Malaysia, and Brunei. A 2016 international arbitration ruling rejected the legal basis for this claim, but Beijing has not recognised the decision, and Chinese coast guard and maritime militia activity in contested waters has continued. For Thailand, which does not have a direct claim in these waters, the practical exposure is indirect: roughly a third of global maritime trade transits the South China Sea, and any disruption there raises freight costs and delivery risk for Thai exporters and importers alike, a concern increasingly reflected in coverage of trade between Thailand and its major partners. Taiwan represents a different order of risk. Beijing considers Taiwan a breakaway province and has not ruled out the use of force to achieve unification. Taiwan is also the world’s dominant producer of advanced semiconductors, meaning any serious escalation would hit the same chip supply chains that Thailand has been positioning itself to benefit from as data-centre and electronics investment shifts toward the kingdom. A disruption to Taiwanese fabrication capacity would ripple through every economy, including Thailand, that is betting on Asia’s tech and AI-driven growth as a growth pillar. A third front, less visible to Southeast Asian firms but strategically linked, is the disputed Line of Actual Control between China and India, where a 2020 clash in the Galwan Valley marked the most serious military confrontation between the two countries in decades. This dispute shapes New Delhi’s broader posture toward Beijing, including its participation in groupings like the Quad, which in turn affects the wider balance of power that Thai policymakers must navigate. Unlike the Philippines or Vietnam, Thailand has no live territorial dispute with China. This gives Bangkok more room to pursue what officials and analysts describe as a strategic tightrope between Beijing and Washington: maintaining deep economic ties with Beijing, including significant Chinese investment in Thai manufacturing and infrastructure, while preserving security and trade relationships with the United States, Japan, and other partners. This is a materially different calculation from claimant states, which must weigh direct sovereignty costs against economic dependency in a way Thailand does not. That flexibility is an asset, but it is not unlimited. Thai firms with regional supply chains, particularly those routing goods through Vietnamese or Philippine ports, or relying on Taiwanese components, inherit exposure to disputes Thailand itself is not party to. Executives increasingly ask not whether Thailand has a dispute with China, but whether their supply chain does. For businesses operating in or through Thailand, three practical implications follow. First, shipping and insurance costs tied to South China Sea transit should be treated as a variable input rather than a fixed assumption, particularly for firms with just-in-time logistics models. Second, semiconductor and electronics-dependent businesses should stress-test supplier concentration in Taiwan against a range of scenarios, not just worst-case conflict but also softer disruptions like export controls or shipping insurance spikes. Third, firms benefiting from Chinese investment inflows into Thai manufacturing should track how Bangkok’s multi-alignment balancing act evolves, since shifts in that posture, whether toward Washington or Beijing, tend to precede changes in the regulatory and investment environment. None of this requires Thai businesses to take a position on the underlying territorial questions, which remain contested between the claimant governments themselves. But treating these disputes as purely diplomatic matters, rather than as inputs into cost and risk planning, is increasingly a blind spot rather than a neutral stance.