Published: 11:32 AM, 28 September 2026
Beijing's Influence on Asia's Most Important Maritime Zones Sparks Debates
China's influence over the South China Sea continues to expand as Beijing combines coast guard patrols, military capabilities, economic power and diplomatic pressure to strengthen its position in one of Asia's most strategically important maritime regions. The growing Chinese presence has increased tensions with several Southeast Asian governments while making the South China Sea a major focus of wider competition between China and the United States.
Beijing claims sovereignty over much of the South China Sea through its historic "nine-dash line." China argues that its activities are intended to protect its territorial sovereignty and legitimate maritime interests. Several Southeast Asian countries, however, maintain overlapping claims, and the competing positions have produced repeated confrontations at sea.
China's influence is particularly visible around Scarborough Shoal, a strategically located feature claimed by both China and the Philippines. Chinese coast guard vessels have maintained a regular presence around the shoal, reinforcing Beijing's claim and challenging Philippine activities in the surrounding waters. The continued presence has become one of the most visible examples of China's efforts to establish greater control without triggering an open military conflict.
This approach is part of what security analysts often describe as "gray-zone" activity. Such operations involve sustained pressure through coast guard vessels, maritime militia, administrative measures and information campaigns rather than direct warfare. China has increasingly used these instruments to influence the behavior of neighboring countries while attempting to avoid a major armed confrontation.
Beijing's influence also rests on physical infrastructure. China has developed and fortified several outposts in the Spratly Islands and other disputed areas. These facilities provide logistical, surveillance and military advantages while supporting a continuing Chinese presence far from the mainland. The development of disputed features has been a major source of concern among rival claimants and the United States.
Vietnam has also expressed concern over Chinese activities in the Paracel Islands. Hanoi has repeatedly protested Chinese construction and other activities in the disputed island chain, which China has controlled since 1974. Vietnam continues to assert sovereignty over the Paracels, making the area another potential source of tension between the two countries.
The legal dispute adds another layer to the confrontation. In 2016, an international arbitration tribunal ruled in a case brought by the Philippines that China's expansive claims in the South China Sea did not have the legal basis asserted by Beijing under international law. The tribunal also recognized Philippine rights in areas within its exclusive economic zone. China rejected the ruling and has continued to maintain its broader maritime claims.
For Beijing, however, influence in the South China Sea is about more than territorial claims. The waterway is strategically important for China's trade, energy supplies, fishing industry and military planning. Major international shipping routes pass through the region, making control and access to the sea important to China's economic and security interests.
The South China Sea is equally important to Southeast Asian economies. Vietnam, the Philippines, Malaysia, Brunei and Indonesia have maritime interests in the region, including fishing grounds, energy resources and shipping routes. Their governments must therefore balance relations with China, an important economic partner, against concerns about sovereignty and maritime security.
The Philippines has become one of the most prominent challengers to China's activities. Manila has strengthened its coast guard capabilities and expanded defense cooperation with the United States and other partners. Philippine officials have repeatedly accused Chinese vessels of dangerous maneuvers and interference with Philippine operations. Beijing rejects such accusations and maintains that its maritime activities are lawful and necessary to protect Chinese interests.
U.S. involvement has added another major international dimension. Washington conducts freedom-of-navigation operations and maintains defense commitments with the Philippines while emphasizing freedom of navigation and international law. China views the growing American military presence in the region as interference, while U.S. officials argue that maintaining open sea lanes is essential to regional security and global commerce.
China's growing influence has therefore produced a complicated regional balance. Beijing possesses substantial economic and military resources, but neighboring countries have responded by strengthening their own maritime capabilities and deepening security relationships with outside powers.
The central question is whether China's expanding presence will eventually produce a more stable regional order or generate further confrontation. For now, Beijing appears determined to maintain and strengthen its position, while Southeast Asian claimants continue to defend their maritime interests.
The South China Sea remains a contested space where diplomacy, international law, economics and military power intersect. As China expands its patrols, infrastructure and diplomatic influence, the region's future will depend not only on Beijing's actions but also on how neighboring governments, ASEAN and external powers respond to China's growing presence.
