Taiwan's air force has settled on a simple ratio for how it wants to protect its fighter fleet going forward: one aircraft, one shelter. That's the actual policy name behind a plan to build 26 new hardened aircraft shelters at Hualien and Taitung, and it's a meaningfully different standard than parking multiple jets together and hoping for the best. The math driving it is straightforward too. Taiwan is taking delivery of 66 new F-16C/D Block 70 fighters from the United States, on top of the 139 existing F-16s already being upgraded to the Viper standard, and once all of that arrives, the island's east coast bases will be sheltering up to 120 F-16Vs. The current shelter inventory doesn't come close to matching that number one-for-one.
The bigger of the two facilities getting attention right now, Chiashan in Hualien, isn't new. Carved into the Central Mountain Range and completed in the early 1990s, it can reportedly hold around 250 fighter jets underground, protected by the mountain itself against both bomb hits and Taiwan's frequent earthquakes. But a facility built more than three decades ago comes with three decades of aging infrastructure, and Taiwan's air force is now asking the legislature for NT$3.57 billion, roughly $112.5 million, to upgrade ten separate systems inside it: ventilation, emergency power, elevators, security doors, fire protection, water and drainage. The Air Force's own stated reason for the overhaul is refreshingly blunt, some of the equipment inside is genuinely hard to maintain because of overseas procurement rules, patent restrictions, and exclusive agency agreements that complicate getting replacement parts at all.
Layer the new 22-shelter buildout at Chiashan and four more at Shizishan on top of that maintenance backlog, and the total price tag across both programs runs to roughly $330 million. The timeline is the part worth sitting with, though: this construction is scheduled to run from 2027 to 2031, with the new F-16 deliveries wrapping by the early 2030s. Taiwan is effectively racing to finish building enough bunkers to match a fighter fleet that's already on its way, a five-year infrastructure project trying to keep pace with an aircraft delivery schedule that's already locked in.
None of this is happening in a vacuum, and Taiwan's own air force has been explicit about the strategic logic behind it: disperse the core of the fighter fleet to Chiashan and Shizishan during wartime specifically to preserve combat capability if China strikes first, particularly with the ballistic and cruise missile arsenal Beijing has spent years building up. It's worth noting China has hardened its own airfields extensively too, so this isn't a one-sided defensive posture, it's two air forces that have each independently concluded a first strike against exposed aircraft is a real enough possibility to justify burying half their fleet inside mountains.
What the shelters don't solve, and what veteran fighter pilots have pointed out before, is the moment an aircraft actually has to leave one. A jet taxiing from an underground bunker out to the runway is, for those minutes, exactly as exposed as it would have been parked in the open the whole time, arguably more vulnerable given how predictable that exposed taxi route is to anyone watching. Underground tunnel networks that let aircraft reach their takeoff point without surfacing early solve that specific problem, but building tunnel-connected taxiways is a considerably bigger and more expensive undertaking than adding shelters, and current reporting on this expansion doesn't suggest that's part of the current plan. Taiwan is buying real protection for its jets while they're parked. What happens in the gap between the bunker door and the runway is still, for now, a separate and unresolved question.



