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China’s build-up on Antelope Reef deepens concerns in the West Philippine Sea and nearby ASEAN states

Article by F. Palafox

Published on July 27, 2026 8:00AM



China’s accelerated work on Antelope Reef shows how Beijing is extending its reach across the South China Sea and West Philippine Sea, with the project expected to strengthen its military and surveillance footprint near waters claimed by several coastal states, including the Philippines. ¹ ² ³ ⁵


Reclamation push


Antelope Reef sits in the Crescent island group in the southwestern Paracels, about 300 kilometers from Sanya Port in Hainan, China and 400 kilometers from Da Nang, Vietnam, according to the Asia Maritime Transparency Initiative. Satellite imagery cited by the initiative estimated the reclaimed land there at about 602 hectares, far larger than Woody Island’s roughly 335 hectares. ¹


That makes the project China’s first major artificial-island expansion in the South China Sea and West Philippines Sea since 2017, a sign that Beijing is still willing to press ahead with large-scale land reclamation despite regional pushback. ¹ ³ ⁴


Strategic meaning


If completed as planned, the reef could host the kind of fixed infrastructure that supports air, naval and sensing operations, giving China more reach in the northern part of the South China Sea and closer watch over nearby sea lanes. The feature may eventually become China’s largest outpost in the Paracels and possibly one of its biggest across the entire South China Sea. ¹ ² ⁶ ⁸


For the Philippines, the development adds to a broader pattern of Chinese expansion that has already affected reefs and waters within the country’s exclusive economic zone in the West Philippine Sea. Manila has repeatedly objected to similar reclamation and militarization activities in the region. ² ⁵ ⁶


Regional reaction


Vietnam has protested China’s activities at Antelope Reef, saying the reclamation is “completely illegal and invalid,” according to the Inquirer report quoting Vietnamese foreign ministry spokesperson Pham Thu Hang. China, for its part, insists the Paracel Islands are part of its territory and says the work is meant to improve living conditions on the islands. ¹


The dispute over the wider South China Sea has long involved the Philippines, Vietnam, Malaysia, Brunei and Taiwan, with overlapping claims and competing maritime rights. ² In that context, the buildup at Antelope Reef is likely to heighten concerns that China is cementing control through militarization on the water rather than through diplomacy. ¹ ² ⁴ ⁷ ⁹

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Notes:


¹ Inquirer. China builds up Antelope Reef as new regional power base. https://www.inquirer.net/482169/china-builds-up-antelope-reef-as-new-regional-power-base



³ Taipei Times. Defense report warns of risks posed by CCP outposts. https://www.taipeitimes.com/News/taiwan/archives/2026/05/25/2003857926


⁴ Global Nation. ‘China dredging 10 reefs’ https://globalnation.inquirer.net/126718/china-dredging-10-reefs


⁵ Global Nation. China seen behind new WPS island-building https://globalnation.inquirer.net/234545/china-seen-behind-new-wps-island-building


⁶ Youtube. Inside Scarborough Shoal: How China is Secretly Building a New Floating Base Near Philippines. https://www.youtube.com/watch?v=nXiGkIkj6sQ



⁸ Foreign Policy Association. Why Is China Building Artificial Islands? https://fpa.org/why-is-china-building-artificial-islands


⁹ Global Nation. Invasion in plain sight: China spits at PH, continues island-building. harassment https://globalnation.inquirer.net/219913/invasion-in-plain-sight-china-spits-at-ph-continues-island-building-harassment

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