Taiwan Rehearses Sealing Off Bridge China Could Use to Storm Taipei

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A Bridge That Could Decide the Battle for Taipei

The Danjiang Bridge only opened to traffic in May 2026, but it has already become one of the most closely watched structures in Taiwan's defense planning. The 920-meter cable-stayed bridge, designed by the firm Zaha Hadid Architects, spans the mouth of the Tamsui River, linking New Taipei City's Tamsui and Bali districts.

Its problem, from a military standpoint, is convenience. The same design that shortened commutes for local residents would also shorten the path for an invading army. Analysts say that if Chinese troops managed to land on the beaches near Bali, one of the coastline stretches considered best suited to a large-scale amphibious assault, the bridge would let them cross the river and push straight into Taipei's outer districts.

Late Thursday, soldiers from the Army's 53rd Engineer Group tested how quickly they could prevent exactly that. Military vehicles rolled onto the bridge as troops unloaded sandbags, strung barbed wire, and set up concrete and Hesco barriers along the span. Civilian cyclists and pedestrians continued crossing the sections left open, a reminder that the bridge remains, for now, ordinary infrastructure.

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Why This Chokepoint Matters

Chieh Chung, a researcher at Taiwan's Institute for National Defense and Security Research who observed the drill, has pointed out that keeping the bridge open would let an invading force move large numbers of troops and supplies quickly from a southern landing zone to the northern bank, putting them at Taipei's doorstep within hours rather than days.

Taiwanese defense officials have described the coastal areas around Bali, the nearby Port of Taipei, and the Tamsui River itself as forming a strategic "iron triangle" for the defense of northern Taiwan. Thursday's drill did not simulate a full closure of the bridge. Instead, it let engineers gather real data on how long it takes to deploy obstacles and how many resources a genuine wartime blockade would require.

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A War Game With No Script

This year's exercise, the 42nd edition of Han Kuang, marks a deliberate break from four decades of tradition. Where past drills largely followed pre-distributed scenarios, commanders this year were reportedly not told in advance what challenges they would face, an approach meant to test whether officers can still function and adapt if China attempts to disrupt Taiwan's command structure at the outset of a conflict.

The live-fire phase runs for ten days, from August 5 to August 14, and involves an estimated 20,000 reservists. It follows a tabletop planning phase held earlier in the spring. Alongside the bridge drill, the exercise is debuting new hardware and units for the first time, including American-made M1A2T Abrams tanks recently delivered to Taiwan's 584th Armored Brigade, and the newly established Littoral Combat Command, which is tasked with unifying the Navy's anti-ship missiles, coastal artillery, radar, and drone systems under a single chain of command.

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Beijing's Long-Standing Threat

China's ruling Communist Party claims Taiwan as its own territory, despite having never governed the self-ruled, democratic island, and has repeatedly refused to rule out taking it by force. Taiwan's government firmly rejects Beijing's sovereignty claims, and the island's 23 million residents have shown no interest in giving up the democratic system they have built since the 1990s, a system Beijing does not tolerate at home.

The Chinese Communist Party has spent recent years intensifying so-called gray-zone pressure on Taiwan, including near-daily military aircraft incursions and naval patrols near the island, well short of open war but designed to wear down Taiwan's defenses and test its responses. This year's Han Kuang exercises are explicitly built around countering those tactics, alongside preparing for a full-scale invasion scenario.

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What Comes Next

The Han Kuang drills continue through August 14, with further phases expected to test amphibious defense, inland resistance, and Taiwan's ability to sustain operations under prolonged attack. How well Taiwan's engineers, reservists, and new command structures perform this year will likely shape how seriously Washington and other partners weigh Taiwan's readiness, at a moment when tensions across the Taiwan Strait show little sign of easing.

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Sources

1. Reuters – https://www.reuters.com/world/china/taiwan-troops-rehearse-sealing-off-key-bridge-strategic-chokepoint-during-war-2026-08-07/
2. AFP via Yahoo News UK – https://uk.news.yahoo.com/taiwan-blocks-key-bridge-drill-171248168.html
3. Focus Taiwan (CNA) – https://focustaiwan.tw/politics/202608020004
4. Taipei Times – https://www.taipeitimes.com/News/taiwan/archives/2026/07/30/2003861658
5. Taipei Times – https://www.taipeitimes.com/News/taiwan/archives/2026/08/03/2003861844

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