Archive · 25 Aug 2026
China Adds Yagong Installations Near Antelope Reef
New buildings have appeared on a small island in the South China Sea.
The island is called Yagong and is near Antelope Reef.
Pictures taken from space show that construction began in March or April.
Experts think the buildings might help detect aircraft or ships with radar.
However, they say it is too early to know exactly what the buildings will do.
China has not confirmed that it is building a new military base there.
Chinese state media have said the larger project could support weather forecasting, fishing protection, and scientific research.
Several countries disagree about who owns parts of the surrounding islands and waters.
Satellite imagery shows new three-pronged installations on Yagong Island near Antelope Reef in the Paracels.
Vantor said imagery captured on August 17 showed construction that began in March and April.
Analysts said the structures could become an early-warning radar facility, though their purpose remains uncertain.
Antelope Reef has a nearly six-kilometre artificial island and a possible runway longer than three kilometres.
China describes Antelope Reef’s potential uses as civilian, while regional analysts see a likely expansion of its military presence.
- Who
- China is carrying out construction in the Paracel Islands; satellite imagery provider Vantor and regional analysts identified the installations.
- What
- New three-pronged structures have been built on Yagong Island near Antelope Reef and may form a radar or observation facility.
- When
- Vantor’s latest image was taken on August 17; other imagery indicated construction began in March and April. The report was published August 25.
- Where
- Yagong Island, about 14 kilometres northeast of Antelope Reef, in the Crescent Group of the western Paracel Islands in the South China Sea.
- Why
- Analysts believe the structures may support the military functions of China’s larger Antelope Reef development, while China has cited civilian purposes for that project.
China’s Civilian Explanation
Analysts’ Military Assessment
Purpose of the construction
China’s Civilian Explanation
China has not acknowledged a new military base, and Chinese state media have said the Antelope Reef project will support weather forecasting, fisheries protection, and scientific research.
Analysts’ Military Assessment
Security analysts said the Yagong structures resemble radar or early-warning facilities and are likely connected to the military functions of nearby Antelope Reef.
Interpretation of Yagong structures
China’s Civilian Explanation
The available information does not establish that the installations are military facilities, and their purpose remains unconfirmed.
Analysts’ Military Assessment
Collin Koh said the limited-scale installation could be a standalone observation post but was most likely a radar station; Damien Symon said a radar facility was possible but cautioned that it was too early to make a firm assessment.
Regional significance
China’s Civilian Explanation
China’s position, as reflected in state-media descriptions, emphasizes civilian services at Antelope Reef.
Analysts’ Military Assessment
Regional security analysts and military attaches said the construction is more likely to strengthen China’s military hold over the northern part of the South China Sea.
- Latest imagery
- Vantor said its latest image was taken on August 17.
- Construction timeline
- Other images indicated construction began in March and April.
- Location
- Yagong Island is about 14 kilometres northeast of Antelope Reef.
- Antelope Reef project
- The artificial island is nearly 6 kilometres long, with a straight coastline longer than 3 kilometres.
- Possible function
- Analysts said the Yagong structures could be an early-warning radar facility or standalone observation post.
- China’s stated purposes
- Chinese state media have described potential civilian uses including weather forecasting, fisheries protection, and scientific research.
- Territorial background
- China has occupied the Paracel Islands since 1974; Vietnam claims the entire grouping.
