China’s Maritime Claims in the South China Sea: A Contested Frontier

China’s Maritime Claims in the South China Sea: A Contested Frontier

Imagine a sea so vital that it carries over a third of global trade, yet so disputed that it risks sparking conflict among nations. The South China Sea fits this description perfectly. Spanning millions of square kilometres, it teems with fish, harbours vast oil and gas reserves, and serves as a key route for international shipping. At the centre of this tension stand China’s bold maritime claims, which have stirred disputes with neighbouring countries and caught the eye of global powers. Exploring the historical roots, legal arguments, and geopolitical stakes of these claims reveals a complex issue that challenges international norms and regional peace. This paper examines China’s position, the responses of other states, and the broader implications, shedding light on a matter that affects far more than just the waters it concerns.

Historical Roots of the Dispute

The South China Sea has been a busy hub for centuries, with fishermen, traders, and explorers from across Asia leaving their mark. Ancient records show Chinese, Vietnamese, and Malay peoples active in these waters, each laying early groundwork for today’s claims. Fast forward to the 20th century, and the picture sharpens. After World War II, the Republic of China in 1947 drew an “eleven-dash line” on a map, encircling much of the sea to assert historical control. When the People’s Republic of China took over in 1949, it trimmed this to a “nine-dash line” but kept the core idea: these waters belong to China based on past use.

Other countries have their own stories. Vietnam traces its claim to the Paracel and Spratly Islands back to the French colonial era, when it governed them. The Philippines points to its closeness to the Spratlys as justification. These historical threads, woven from old maps and tales of exploration, clash today as each nation defends its version of the past. The result is a tangled web of overlapping assertions that fuel modern tensions.

The Legal Framework at Play

Understanding the rules governing these disputes requires a look at the United Nations Convention on the Law of the Sea, or UNCLOS. Signed in 1982, this treaty sets out how countries can claim rights over the sea. It grants every coastal state a territorial sea up to 12 nautical miles from its shore, where it has full control. Beyond that, an exclusive economic zone (EEZ) stretches up to 200 nautical miles, giving rights to fish and drill for oil. There’s also the continental shelf, which can extend further for resource extraction. All the countries involved here, including China, have signed up to UNCLOS.

However, applying these rules gets tricky in the South China Sea. The area bristles with islands, reefs, and rocks, and their status under UNCLOS matters. An island can claim an EEZ, but a rock cannot, and a reef submerged at high tide gets nothing. Sorting out which is which drives much of the legal wrangling, as the answers shape who controls what. UNCLOS aims to settle such questions, but agreement remains elusive.

What China Claims

China’s stance is striking for its scale. The nine-dash line sweeps across roughly 90% of the South China Sea, overlapping with the EEZs of Vietnam, the Philippines, Malaysia, and Brunei. Beijing argues this vast area falls under its sway due to historical rights—its people fished and sailed there long before modern laws existed. This line first appeared on official maps in the 1940s and has since become a symbol of China’s ambitions.

To back this up, China has taken bold steps. Since the early 2010s, it has built artificial islands on reefs in the Spratly and Paracel groups, adding airstrips, ports, and even missile systems. These moves strengthen China’s grip, turning tiny outcrops into outposts. Critics see this as a power play, but China insists it’s protecting its rightful territory. Either way, the scale of its claims and actions sets it apart—and puts it at odds with its neighbours.

Voices of Other Claimants

Neighbouring countries push back with their own claims, creating a crowded map of competing interests. Vietnam asserts control over the Paracels and Spratlys, citing centuries of fishing and governance. The Philippines stakes its case on proximity, arguing features like Scarborough Shoal lie within its EEZ. Malaysia and Brunei claim smaller slices, focusing on waters off their coasts. Even Taiwan echoes China’s nine-dash line, though with less muscle behind it.

Tensions flare when these claims collide. Take the 2012 standoff at Scarborough Shoal: Philippine fishermen faced off with Chinese vessels, only for China to seize control after weeks of brinkmanship. Such clashes highlight the stakes—and the imbalance. Smaller states struggle to match China’s might, leaving them reliant on diplomacy or outside help to press their cases.

The World Responds

The disputes have not gone unnoticed globally, with a key moment arriving in 2016. The Philippines took China to the Permanent Court of Arbitration, challenging the nine-dash line under UNCLOS. The court ruled that the line had no legal basis and that many features China claimed were not islands but rocks or reefs, ineligible for EEZs. This decision was a win for the Philippines and a boost for UNCLOS as a tool for fairness.

China, however, dismissed the ruling outright, calling it meaningless and refusing to budge. This defiance rattled observers, raising doubts about how well international law can hold up against a determined power. Other nations took note: Vietnam cheered the outcome, while the United States and its allies ramped up calls for respect for the rules. The ruling clarified rights but did little to ease the friction on the water.

Wider Stakes and Tensions

Beyond legalities, the South China Sea carries weight for global politics. Over $3 trillion in trade flows through it yearly, making it a lifeline for economies worldwide (Poling, 2021). The United States, though not a claimant, sails warships through the area in “freedom of navigation” missions to keep it open. China bristles at these moves, seeing them as meddling in its backyard.

Other players weigh in too. Japan and Australia back the U.S. stance, while the Association of Southeast Asian Nations (ASEAN) pushes for a Code of Conduct to calm things down. Progress is slow, though, and accidents—like near-misses between ships—keep nerves on edge. The mix of valuable resources, busy shipping lanes, and military posturing makes this a hotspot where missteps could spark bigger trouble.

The South China Sea sits at a crossroads of history, law, and power. China’s claims, rooted in its view of the past and reinforced by modern might, clash with the rights of smaller neighbours and the rules of UNCLOS. The 2016 ruling offered clarity, but without China’s buy-in, it remains more symbol than solution. Still, hope lingers in talks like those within ASEAN, where cooperation could yet prevail.

Reflecting on this, one wonders: can a sea so vital to all be shared, or will it divide? The answer hinges on whether nations choose dialogue over dominance. For now, the South China Sea remains a test—of law, of resolve, and of the world’s ability to manage its toughest disputes.

References

1. Beckman, R. (2019) The South China Sea Disputes: A Legal Perspective. Singapore: NUS Press.
2. Hayton, B. (2020) The South China Sea: The Struggle for Power in Asia. New Haven: Yale University Press.
3. Poling, G. B. (2021) On Dangerous Ground: America’s Century in the South China Sea. Oxford: Oxford University Press.
4. Storey, I. (2022) ‘China’s Maritime Ambitions in the South China Sea: A Geopolitical Analysis’, Asian Security, 18(2), pp. 123-140.
5. Wu, S. and Zou, K. (2018) Maritime Security in the South China Sea: Regional Implications and International Cooperation. London: Routledge.