On June 30, 2026, three seemingly independent pieces of news converged on the same day: the PLA Southern Theater Command organized combat-ready patrols in the territorial waters and airspace of Huangyan Dao (Scarborough Shoal), with fighter jets armed and intercepting foreign targets; the China Coast Guard conducted law enforcement patrols in and around Huangyan Dao's territorial waters, hailing Philippine vessels in English over loudspeaker; and the Ministry of Natural Resources released the "Assessment Report on the United Nations Convention on the Law of the Sea," systematically challenging the legal basis of the 2016 South China Sea arbitration ruling from a jurisprudential standpoint. The synchronized execution of three lines of effort on a single day reveals a "twin-track" strategy Beijing is currently operating in the South China Sea — the exercise of sovereignty at the level of military and law enforcement, operating in parallel with and mutually reinforcing the reconstruction of legal norms.
The three concurrent events of June 30, 2026, reveal a "twin-track" strategy Beijing is currently operating in the South China Sea — sovereignty assertion on the ground through military and law enforcement combined with rule reconstruction at the legal level, operating in parallel and mutually reinforcing. On July 30 this was upgraded to a full-element Air Force–Coast Guard joint enforcement operation; then on August 1 — Army Day itself — a naval-and-air joint drill was carried out, experts confirmed that such drills would become normalized, four government departments jointly issued management measures for a nature reserve on the same day, and the military and police each made public their own sets of exercise scenarios and equipment details. The twin-track strategy has moved from incident response to a mature form of "routine administration plus sustained presence."
Track One: Military Presence and Law Enforcement Patrols in Parallel
The June 30 operation unfolded across three layers simultaneously. The Southern Theater Command deployed naval and air assets into the territorial waters and airspace of Huangyan Dao for combat-ready patrols, intercepting Philippine aircraft — the highest-intensity force demonstration by the PLA in the Huangyan Dao direction in recent months. At the same time, the China Coast Guard conducted law enforcement patrols in the same waters, hailing Philippine vessels in English over loudspeaker. The division of labor was clear: the military handled military-level foreign targets, while the Coast Guard managed day-to-day law enforcement and maritime order.
The synchronization of these two actions means that China's control system in the South China Sea has evolved from a "single-agency response" into a normalized "military–police coordination" mechanism. Theater Command forces and Coast Guard assets operate in the same waters on the same day, each with distinct responsibilities yet working in concert — not a temporary operation, but the public demonstration of a fully integrated two-tier control model.
Track Two: The Jurisprudential Counterstrike of the UNCLOS Assessment Report
On the same day, the Institute for Maritime Strategy Studies under the Ministry of Natural Resources released both the Chinese and English editions of the "Assessment Report on the United Nations Convention on the Law of the Sea." The timing and substance of this report are worth examining closely.
The report's core argument operates on three levels. The first is affirmative: the Convention is an important achievement of postwar maritime rule of law, serving multilateralism and countering maritime hegemony. The second is boundary-setting: the Convention is not the sole source of the law of the sea, and "matters not regulated by the Convention shall continue to be governed by the rules and principles of general international law" — a formulation that provides direct jurisprudential basis for rejecting the legal force of the South China Sea arbitration award. The third is diagnostic: the report directly identifies "distorted interpretations, abusive litigation and arbitration, and unauthorized expansion of powers" as practical problems in the Convention's implementation, and recommends "complete, accurate, and good-faith interpretation and application of UNCLOS."
The eight Chinese characters "滥诉滥裁、越权扩权" (abusive litigation, arbitrary rulings, overreach and mandate creep) point directly at the 2016 South China Sea arbitration case. China's consistent position has been "non-participation, non-acceptance, non-recognition, and non-enforcement" — and this assessment report now supplies the academic-jurisprudential reasoning: the arbitral tribunal's application of UNCLOS was itself a violation of the Convention.
The Logic of Synchronization — Why the Same Day
June 30 was not a coincidence. The simultaneous release of military/law enforcement signals and the legal assessment report on the same day created a complete, integrated narrative:
- The signal from the military/law enforcement track was: "China has both the capability and the resolve to defend its sovereignty on the ground."
- The signal from the legal assessment track was: "China's actions have a basis in international law, and it is the arbitration award itself that constitutes an abuse of international law."
The two tracks are each independent and self-sufficient, but when deployed together they form a combined move that cannot be broken individually. Military operations cannot be shaken by legal controversy — because the legal basis has already been established beforehand. Legal claims cannot be dismissed as "coercion backed by force" — because the legitimacy of sovereign enforcement has support from international law.
This coordination operates on two time scales that lock each other in: in the short term, on-site law enforcement actions directly block any potential infringement moves by the Philippine side; over the long term, the legal report reconstructs the international community's cognitive framework on the South China Sea issue, pre-positioning the discursive foundation for any future dispute resolutions and international discussions.
The Audiences of the Twin Tracks
The two tracks also address different audiences.
The military/law enforcement track is primarily aimed at the direct actors in the region — the Philippines and the American alliance system behind it. The images and sounds of "armed jets on patrol," "English-language hails," and "sustained Coast Guard patrols," disseminated through state media, create an immediate deterrent force constraining day-to-day behavior in the region.
The legal assessment report is primarily aimed at the international community and multilateral legal platforms. The academic identity of the Ministry of Natural Resources' Institute for Maritime Strategy Studies gives the report a formal distinction from a government statement — it is not a diplomatic note, but an academic assessment. This form helps win understanding and recognition from more states within the UNCLOS framework.
Together, the two tracks cover the full spectrum from "on-site deterrence" to "legal persuasion." What needs to be directly controlled is controlled with on-site force; what the international community needs to understand is explained through a legal framework.
The Coordinate Significance of the Twin-Track Strategy
Looking back at the South China Sea situation since late May 2026, the "dual-track parallel" of rights-protection measures has not been a first appearance. Around the Shangri-La Dialogue in late May, China responded across four dimensions simultaneously — military (escort mission transformation), legal (1996 baseline declaration), diplomatic (SLD statements), and strategic (same-day combat-ready patrols at Huangyan Dao) — forming a publicly rehearsed "four-layer closed loop."
The June 30 operation can be seen as a more mature version of the same logic: the four dimensions of the closed loop were compressed into two main lines — on-site enforcement and legal reconstruction. The former merges the military and law enforcement dimensions of the "closed loop," while the latter deepens the legal dimension. The two lines have been upgraded from "four-dimensional synchronization" to "twin-track parallelism." But this pair of tracks is not a mere dimensionality reduction — it is an efficiency improvement: fewer actions delivering a more concentrated signal.
PLA Southern Theater Command: Combat-ready patrols in Huangyan Dao territorial waters and airspace; fighter jets armed, intercepting Philippine aircraft
China Coast Guard: Law enforcement patrols in Huangyan Dao territorial waters and surrounding areas; English-language hails to Philippine vessels
Ministry of Natural Resources: Released UNCLOS Assessment Report, systematically challenging the legal basis of the 2016 South China Sea arbitration award
The July 30 Continuation — Air Force–Coast Guard Full-Element Joint Enforcement Upgrade
On July 30, 2026, a significant escalation occurred in the Huangyan Dao direction: the PLA Southern Theater Command organized naval and air forces for combat-ready patrols in the territorial waters, airspace, and surrounding maritime areas of Huangyan Dao, while the China Coast Guard simultaneously conducted law enforcement patrols in and around its territorial waters — two full systems of force, the Air Force and the Coast Guard, operating simultaneously in the same waters.
Compared with June 30, the July 30 operation had two critical differences.
First, the direct involvement of the Air Force. While June 30 involved coordination between the Southern Theater Command's naval/air assets and the Coast Guard, on July 30 it was the Chinese Air Force's fighter jets that directly issued verbal warnings to Philippine military aircraft. Footage released by People's Daily showed Chinese Air Force jets flying armed and delivering bilingual warnings — "Watch your words" — marking the public debut of the Chinese Air Force in the Huangyan Dao direction. Notably, the operation deployed JL-10 trainer jets — a choice that itself carried a signal: not deploying the most cutting-edge equipment to the front line, but using second-tier assets to accomplish the same mission.
Second, the normalization of English-language hails. On July 30, the Coast Guard continued using English to warn Philippine vessels, deploying water cannons to drive away harassing ships — the same methods as June 30, indicating that these procedures had moved from "first use" into "established routine." The simultaneous coverage by Pear Video (Yuyuan Tiantian) and the Chang'anjie Zhishi account pointed to the same conclusion: this was not an improvised response but a pre-planned rhythm.
The closed loop of combat and law enforcement. The Southern Theater Command handled "combat-ready patrols" (military-level threats), while the Coast Guard handled "law enforcement patrols" (maintaining day-to-day order), forming a clear division of labor within and beyond Huangyan Dao's territorial waters. Shen Yi, in his analysis, summarized it as "the normalization of the PLA's combat-ready patrols in Huangyan Dao's territorial waters and airspace — since July, theater command forces have continuously strengthened patrol and alert operations." This confirms that the "twin-track" strategy in the Huangyan Dao direction has evolved from its June 30 debut into a monthly pressure rhythm.
PLA Southern Theater Command Air Force: Combat-ready patrols in Huangyan Dao territorial waters and airspace; armed fighter jets delivering bilingual warnings to Philippine military aircraft (JL-10 trainer jets deployed)
China Coast Guard: Law enforcement patrols in Huangyan Dao territorial waters; English-language warnings and water cannon to drive away harassing vessels
Significance: Full-element joint law enforcement upgrade of military–police coordination; twin-track strategy enters a monthly normal rhythm
The August 1 Legal Offensive — Territorial Sea Baselines and a Patrol Emblem
From the evening of July 31 into the early hours of August 1, a new legal move appeared in the Huangyan Dao direction: the Philippines drew so-called “territorial sea baselines” around Huangyan Dao, which is Chinese territory. That evening the Ministry of Foreign Affairs issued a statement more comprehensive in its wording than any previous response — not only reaffirming that “Huangyan Dao has never been within the scope of Philippine territory,” but dismantling the Philippine legal toolkit point by point: the unilaterally initiated South China Sea arbitration is “illegal, void, and without binding force,” and the so-called “Maritime Zones Act” amounts to “entrenching an illegal ruling in the form of domestic legislation.”
The warning at the end of the statement is worth noting: “China demands that the Philippine side genuinely respect China’s territorial sovereignty and maritime rights and interests, and refrain from any infringing or provocative actions at Huangyan Dao; otherwise China will respond with resolute measures.” The phrase “resolute measures” echoed a Huangyan Dao patrol-themed emblem released by the Southern Theater Command on the same day.
In the small hours, Shen Yi reposted the Southern Theater Command’s Huangyan Dao patrol emblem — a military symbol that gives “combat patrol” a visual form. Laid out on a timeline: the Ministry of Foreign Affairs statement on the evening of July 31, then the Southern Theater Command emblem released just after midnight on August 1. The legal pronouncement and the military presence were announced in near-seamless succession — another textbook move of the “twin-track” strategy, in which the Foreign Ministry dismantles the other side’s legal instruments while the theater command puts its presence on display in the most direct way possible.
The twin-track of June 30 was “same-day” — military law enforcement and the UNCLOS report released in sync; July 30 brought a full-element naval-and-air joint enforcement operation; in this August 1 round, legal warfare has escalated into a direct response to a sovereignty-line-drawing move such as “territorial sea baselines,” while the emergence of a patrol emblem means the Huangyan Dao narrative is acquiring its own visual symbol — moving from “demonstrating action” into “cultivating symbols.”
The August 1 Drill Lands — Closing the Combat-Ready Loop of Legal Warfare
The preceding section on legal warfare recorded the diplomatic statement and emblem release from the evening of July 31 into the early hours of August 1; on the morning of August 1, the Huangyan Dao direction entered a combat-ready phase — the PLA Southern Theater Command organized a naval-and-air joint drill in the territorial waters, airspace, and surrounding sea-and-air zones of Huangyan Dao. The official formulation described it as “a necessary action targeting the current situation in the South China Sea and the disruption of regional peace and stability by certain regional states, aimed at testing and enhancing the troops’ combat-ready capability to safeguard national territorial sovereignty and maritime rights and interests.”
Stretching out the rhythm of the “twin-track”: the June 30 debut (military law enforcement plus the UNCLOS report), the July 24 Philippine press delegation and fleet combination, the July 30 full-element Air Force–Coast Guard joint enforcement, and the August 1 naval-and-air joint drill. Beijing’s responses are not symmetric, point-for-point retorts but a calibrated escalation on its own timetable: from combat-ready patrols to joint enforcement to live drills — and holding the drill on Army Day, August 1, makes the symbolism of the date itself part of the signal.
The Foreign Ministry statement and patrol emblem on the evening of July 31 were the “symbolic layer”; the naval-and-air joint drill on the morning of August 1 was the “live-fire layer.” Legal pronouncement and military exercise were joined within 24 hours, confirming that the “twin-track” is not two separate things but two execution faces of a single strategy.
Forecasting Normalization — Expert Readings and the Filling-In of Legal Detail
On the morning of the drill, Yuyuan Tiantian pressed a more specific question: why drill now? A video citing expert views offered two judgments: first, that it was a necessary action targeting the current South China Sea situation and the disruption of regional peace and stability by certain regional states; and second, that “drills at Huangyan Dao will become normalized in the future.” Reporting by Russia’s Sputnik filled in the legal detail — the scope of Philippine territory is explicitly delimited by international treaties including the 1898 Treaty of Paris, and Huangyan Dao is not within it; the Chinese government drew and published Huangyan Dao’s territorial sea baselines in November 2024 and deposited the relevant statement and charts with the United Nations in December.
The word “normalization” reframes the August 1 drill from a one-off event into a starting point. Set against the rhythm since June 30 — combat-ready patrols, joint enforcement, naval-and-air drills — if drills become routine, then the “military-enforcement face” of the twin-track strategy upgrades from case-by-case response to sustained presence. The repeated emphasis on legal detail serves the same goal: every on-site action is backed by treaties and baselines, so that “normalization” rests not on slogans but on citable legal documents.
Yuyuan Tiantian, citing experts, said drills would become normalized in the future — if that comes true, the Huangyan Dao direction would become structurally identical to the China Coast Guard’s “normalized enforcement patrols” around Taiwan: a shift from incident response to everyday presence. Two maritime enforcement lines would then be running on the same logic.
The August 1 Administrative Track — Nature Reserve Rules and the Drill’s “Targeting”
On the same day the drill landed, another document laid down a third track of the twin-track strategy. On August 1, four bodies — the Ministry of Natural Resources, the National Forestry and Grassland Administration, the China Coast Guard, and the Hainan Provincial People’s Government — jointly issued the “Administrative Measures for the Huangyan Dao National Nature Reserve,” comprising sixteen articles. The reserve covers a total area of 3,523.67 hectares, of which 1,242.55 hectares form a core zone and 2,281.12 hectares a general control zone; strict protection is enforced, and activities such as fishing, mining, and the harvesting of coral, coral reefs, and giant clams are prohibited without approval. The Ministry of Natural Resources is responsible for the protection and management of territorial sea base points, the Coast Guard is to establish a routine patrol-and-guard system, and the four bodies are to set up a coordination mechanism.
The weight of this document lies not in its number of articles but in its issuing bodies. The combination of the Ministry of Natural Resources, the Forestry and Grassland Administration, the Coast Guard, and the Hainan provincial government means that the governance of Huangyan Dao has shifted from “military presence during patrols” to “routine administrative management”: boundary surveying, planning, patrol-and-guard, ecological restoration, and the investigation and handling of violations — a sovereignty claim translated into a full set of enforceable administrative procedures. The article on protecting and managing territorial sea base points deserves particular attention: it connects the territorial sea base points published in 1996 and the Huangyan Dao baselines drawn in November 2024 into the day-to-day stewardship chain of a nature reserve, giving the legal basis, for the first time, a corresponding administrative handle.
Shen Yi’s observation that same afternoon supplied the military footnote to this administrative track. He unusually singled out a shift in the wording of the drill statement: “In the past the phrasing was generally that it was not targeted at anyone; this time it simply said it was targeted.” More crucial is the scope of the drill itself — it not only covers Huangyan Dao’s territorial waters and airspace but extends outward, approaching Luzon and pressing right up to Manila Bay. From “not targeted” to openly “targeted,” from the vicinity of a reef to the Philippines’ doorstep, wording and range have advanced in lockstep.
Lay the three tracks together: the military track (drills and patrols), the legal track (the UNCLOS report, the baseline statement, and the reserve management measures), and the diplomatic track (dueling statements). Within a single day on August 1, a four-department document landed, the drill expanded outward, and the statements grew blunt — three events on the same day, and the pacing itself is a signal.
The reserve management measures translate the sentence “Huangyan Dao is China’s inherent territory” into survey coordinates, patrol systems, and penalty clauses. Once a sovereignty claim has a vehicle for everyday administration, the twin-track strategy gains another execution face that can keep running without mobilizing a single warship.
The August 1 Scenario Sheet — The Division-of-Labor Script Between Military Deterrence and Coast Guard Enforcement
By evening, two sets of exercise scenarios had made their details public on the same day. The Southern Theater Command’s naval-and-air joint drill focused on reconnaissance and early warning, deterrent cruising, sea-and-air control, and joint assault; the China Coast Guard’s rights-protection and enforcement-control drill covered boarding and arrest, blocking and interception, and forced towing, with on-site footage showing the Coast Guard simulating the towing away of an infringing vessel.
Placed side by side, the two scenario sheets reveal a clear division of labor: the military handles “no one is allowed near, whoever they are,” while the Coast Guard handles “what to do once someone gets near.” Deterrent cruising and sea-and-air control correspond to turning Huangyan Dao’s territorial waters and airspace into a line of denial; boarding-and-arrest and forced towing correspond to the graduated enforcement procedures that follow once that line is breached. One draws the boundary, the other deals with those who cross it — the military and police scripts made public on the same day are themselves an operationalization of the twin-track strategy.
A statement by China Coast Guard spokesperson Jiang Lue added a footnote to this script: the Coast Guard will intensify rights-protection and enforcement control in the waters near Huangyan Dao. Combined with the Coast Guard’s continuous presence at Huangyan Dao since December 27, “intensifying” is not an improvised phrase but a public commitment about enforcement frequency. The disclosure of scenarios on August 1 gives the earlier judgment about “normalized drills” a more concrete form: normalization is not only about the number of drills but about the scenarios themselves moving from “display” to “disclosure” — even what is rehearsed and how it is rehearsed are now being explained to the outside world.
Reconnaissance and early warning → deterrent cruising → sea-and-air control → joint assault is the military’s escalation ladder; boarding-and-arrest → blocking-and-interception → forced towing is the Coast Guard’s enforcement ladder. Releasing both ladders on the same day effectively turns “how Huangyan Dao is defended” from an internal plan into a public script.
The August 1 Order of Battle — From Scenarios to Equipment Detail
After the scenario sheet was made public, equipment details were laid on the table the same day. The Southern Theater Command unusually released on-site footage of the drill, and the Global Times interviewed military expert Zhang Junshe, who parsed the weapons in the footage piece by piece:
In the air, H-6K bombers carried YJ-12 heavy supersonic anti-ship missiles — with a range of four to five hundred kilometers, fully covering the Huangyan Dao sea area; they cruise supersonically throughout, with a terminal penetration speed of four to five Mach, capable of severely damaging or even disabling large surface combatants of ten thousand tons or more. The maritime formation included a Type 071 amphibious landing ship and Type 054A and Type 056A missile frigates, the landing ship, as its name implies, possessing the capability for island-landing operations.
Zhang Junshe’s analysis strings these weapons into a chain: Z-20J and Z-8C helicopters taking off and landing on the Type 071 landing ship, paired with Yema (Wild Horse) hovercraft launching and recovering from the dock, signals the mature coordination of three links — shipborne aviation, vertical air delivery, and horizontal heavy-equipment delivery by sea — a three-dimensional amphibious combat system of “vertical air assault plus heavy beach assault.” The Z-8C handles the delivery of personnel and materiel in large volume; the Z-20J combines delivery with accompanying fire suppression and the rapid helicopter-borne seizure of key points; and the Yema hovercraft can carry heavy equipment such as tanks and armored vehicles, suited to the environment of reef flats and shallows, making up for the helicopters’ inability to deliver heavy equipment.
Set this against the preceding section on the August 1 scenario sheet: the scenario list says what is being rehearsed, while the order of battle says what is being rehearsed with. The material backing for the joint-assault scenario is the range of the YJ-12 plus the hovercraft’s beachhead; the official characterization that the drill “demonstrated the PLA’s powerful capability for sea assault and island-landing operations” has, for the first time, footage corresponding to specific weapons. Displaying sea assault and island-landing capabilities simultaneously points to an operational target that is two sides of the same coin as the drill’s scope — “approaching Luzon and pressing up to Manila Bay” — described earlier on this page.