China’s People’s Liberation Army Southern Theater Command staged joint naval and air training around the disputed Scarborough Shoal drills on Sept. 27, a day after President Xi Jinping returned from talks in the United States, sharpening pressure on the Philippines in the South China Sea.
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The command said the operation in the waters and airspace around the shoal—called Huangyan Dao by Beijing and Bajo de Masinloc by Manila—was a “necessary” response to countries it accused of undermining regional peace, and aimed to test combat capabilities for defending territorial sovereignty and maritime rights.
Scarborough Shoal drills follow Xi’s Washington trip
According to Chinese state media and a Southern Theater Command WeChat statement carried by outlets including CGTN and Reuters, naval and air units trained together Sunday around the triangular reef formation that surrounds a lagoon about 124 nautical miles off Masinloc, Zambales. Philippine officials did not immediately issue a detailed public response; the Philippine Embassy in Beijing did not immediately comment when asked by Reuters. Claim by Chinese state media (state-controlled); confirmed by Reuters
The timing mattered as much as the location. Xi had just finished a White House summit with President Donald Trump in which Taiwan and broader Indo-Pacific issues loomed large. Staging visible force near a flashpoint with a U.S. treaty ally the next day signaled that summit choreography would not pause China’s local military messaging.
Legal status and Manila’s EEZ claim
Manila considers Scarborough Shoal within its 200-nautical-mile exclusive economic zone under the UN Convention on the Law of the Sea. A 2016 Permanent Court of Arbitration ruling treated the high-tide features as rocks that generate no EEZ of their own and found that China had unlawfully blocked Filipino traditional fishing there. Beijing rejects the award and asserts historic rights across the South China Sea islands.
The reef’s rich fishing grounds have made it a recurring confrontation zone for coast guards and fishing fleets. Earlier this week, China Coast Guard said it tracked and warned a Philippine supply vessel near Second Thomas Shoal, underscoring that Scarborough is only one node in a wider contested chain that also includes incidents documented in The Boston Report’s earlier coverage of Chinese naval activity at Sabina Shoal.
Live-fire warnings and regional military signaling
Guangdong’s Zhuhai Maritime Safety Administration separately warned of live-fire exercises in parts of the South China Sea on Sept. 28 and 30, telling vessels to stay clear. Chinese commentary in Global Times framed Sunday’s Huangyan Dao training as aimed at the Philippines and at deterring reliance on “foreign forces.”
Those moves land in a theater already tense over missile deployments and alliance exercises. Tokyo’s Typhon system on Kyushu drew sharp protests from Beijing and Moscow, as outlined in China and Russia’s joint objection to the Japan Typhon placement, while analysts continue to watch Chinese undersea and naval mapping trends described in prior reporting on Beijing’s undersea mapping push.
Why the shoal still matters for trade and alliances
Scarborough sits astride approaches that matter for Philippine coastal security and for wider South China Sea lanes that carry a large share of global trade. For Washington, drills so soon after a Trump-Xi meeting test whether summit language on stability translates into restraint at sea. For Manila, each PLA show of force raises the cost of resupply missions and civilian fishing access even when no shots are fired.
Accounts of the Sunday training were reported by GMA News via Reuters and CGTN, with additional context on post-summit timing from The Asia Business Daily. Absent a diplomatic off-ramp, joint naval-air packages around disputed features are likely to remain Beijing’s preferred tool for asserting presence without crossing into open combat.
Sources
- GMA News via Reuters (gmanetwork.com)
- CGTN (news.cgtn.com)
- The Asia Business Daily (asiae.co.kr)
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