China’s persistent efforts to expand its military and strategic footprint in Southeast Asia are entering a new phase. The rapid transformation of disputed maritime features, the development of a potentially unprecedented mobile floating research platform, and the establishment of a joint military training facility in Laos point to a broader strategy of extending Beijing’s operational reach. These developments could significantly enhance China’s capacity for surveillance, logistical support, military access and coercion across the Indo-Pacific. The implications extend beyond the South China Sea (SCS)/East Sea (ES).Recent imageries reveal transformation of Antelope Reef into a massive artificial island. It has 1500 acre of land with a deep-water port that can host warships. It is nearly 6-km long, with a straight line of coast longer than 3-km, which could be a runway. China began construction work around late 2025, and the first phase of construction has already been completed. The scale and pace of construction illustrates China’s capabilities to transform maritime geography to serve its strategic interests.Antelope Reef sits in a key strategic location south of Sanya Port and Yulin Naval Base on Hainan Island, home to two of the three People's Liberation Army Navy's (PLAN) aircraft carriers, CNS Shandong and CNS Fujian, as well as a significant submarine force at Longpo Naval Base.While Beijing claims that the infrastructure will be used for monitoring the weather, the imagery reveals that it would be a military base. This will be the eighth military outpost in the SCS/ES. The constellation of artificial islands enhances China’s footprint in this region. They can act as logistical and persistent surveillance nodes, among other uses. Vietnam has rightly slammed the Chinese activity and called the infrastructure "illegal and invalid" as it falls in its claimed area. Equally important is China’s construction of a 78,000 tonnes, semi-submersible twin-hull platform, mobile and self-sustaining research platform, which will have the capacity to house 238 occupants for four months without resupply. The platform will measure 138 metres long and 85 metres wide, with a main deck rising 45 metres above the waterline. This ‘floating island’ can cruise at 15 knots. It is using “metamaterial” (artificially structured material tailored to meet special requirements) sandwich panels to turn catastrophic shocks into gentle squeezes. Its superstructure contains critical compartments that ensure emergency power, communications and navigation control. Described as a Deep-Sea All-Weather Resident Floating Research Facility, it is a far-sea floating dual-use mobile island. It could support oceanographic research, underwater surveillance, seabed mapping and testing of advanced marine technologies.This facility has considerable military and strategic value. By deploying this massive platform in the disputed waters, Beijing can establish a continuous presence in areas of its choice. China could declare surrounding exclusion zones, effectively restricting the movement of foreign naval vessels and aircraft. It can be deployed deep into international waters to act as a floating logistics hub, radar outpost, or command centre.Another important development is Beijing’s establishment of a new joint military outpost in Laos (Ben Keun airport). This is the first military facility abroad in the air domain. Though the Laotian facility’s future role is not clear; it deserves Vietnam’s attention. The base could give the Chinese air force alternate routes to access disputed areas in the SCS/ES and strategic air routes around Vietnam.The timing of the above activities is important. This year, with the US getting involved in the West Asian war, its influence is at its lowest in decades in SCS/ES. The US administration had to pull out troops and weapons from the Indo-Pacific. In past also, China had repeatedly exploited such situations.The big picture of China’s motives reveals five dimensions. First, China continues to change the geographical features in the SCS/ES in its favour. There are now eight artificial islands constructed by Beijing. Second, China is creating military outposts not only at sea but also in the neighbouring countries. Third, the base in Laos could help in using its air power for coercive operations. Fourth, the floating island will enable it to place it in sensitive locations under the guise of research. The floating artificial island can become an important instrument for Beijing’s expansionist approach. Fifth, the ultimate aim of Beijing is not only to establish its dominance in the SCS/ES but to move from there to the Indian Ocean. China has already created a string of pearls around India. The increasing challenges for Southeast Asia and the wider region demand a carefully drafted unified strategy to deny any unilateral change in the geographical features. The challenge for the Southeast Asian countries is to prevent incremental changes from becoming irreversible strategic realities. They must make it clear to Beijing that economic engagement and practical cooperation cannot legitimise the unilateral changes.The response should begin with a stronger ASEAN-centred approach. Southeast Asian countries need a more effective collective strategy grounded in ASEAN unity, strategic autonomy, credible deterrence, economic resilience and adherence to international law. As the Code of Conduct is unlikely to be finalised soon, the existing UNCLOS, the Convention on the International Regulations for Preventing Collisions at Sea (COLREGs), along with the “Radio Regulations” of the International Telecommunication Union (ITU) should be utilised to contain China’s grey zone tactics and creeping expansion. In addition, the Treaty of Amity and Cooperation provides a broad framework for the peaceful resolution of disputes.The UNCLOS has received a boost on the 10 th Anniversary of the PCA Ruling, when 14-nations, reaffirmed collective supported the Ruling and a rules-based Indo-Pacific order. It significantly strengthens the rules-based order, though it cannot itself compel China. There is a case for all interested nations for peace and stability in the region to jointly push for the implementation of international laws. India’s Indo-Pacific Oceans Initiative and MAHASAGAR provide relevant frameworks for cooperation in maritime security, capacity-building and sustainable development to ensure peace and stability through the implementation of the UNCLOS. In sum, a united, capable and strategically autonomous Southeast Asia, supported by constructive partnerships with India and other like-minded countries, offers the most credible path towards preserving an open, stable and peaceful Indo-Pacific.
Disclaimer: Views expressed above are the author's own.
