President Lai Ching-te (賴清德)'s planned state visit toEswatini — Taiwan's only remaining diplomatic ally on the African continent — collapsed on the eve of departure after China pressured Seychelles, Mauritius, and Madagascar to revoke overflight permits for the presidential aircraft. The Presidential Office announced the cancellation on April 21, citing the last-minute withdrawal of flight authorizations as the reason for suspending the trip.
What has drawn scrutiny in the days since is not just Beijing's intervention, but a decision made by Taiwan's ownNational Security Bureau (NSB) a week before the trip fell apart.
A Public Announcement That Signaled The Visit
On the afternoon of April 16, the NSB issued an unusually public press release announcing that its director, Tsai Ming-yen (蔡明彥), had traveled to Eswatini to conduct a security assessment ahead of the presidential visit. The statement disclosed that Tsai had met with King Mswati III, Deputy Prime Minister Thulisile Dladla, and the heads of relevant security agencies — and the bureau released two photographs of those meetings.
In the press release, Deputy Prime Minister Dladla was quoted as thanking Taiwan's intelligence services for sharing criminal intelligence and providing training support after Eswatini dismantled a large transnational fraud network and arrested approximately 200 Chinese nationals. Tsai, in turn, called for deeper security cooperation and intelligence sharing between the two countries, and pledged joint efforts to counter international crime and what he described as illegal infiltration by China.
The NSB is an agency that typically operates without public visibility. Its decision to publish a formal statement and photographs — identifying its director, his location, and the purpose of his mission — was immediately striking to those familiar with intelligence tradecraft. The bureau's apparent confidence that the visit would proceed as planned proved misplaced.
A Serious Breach Of Protocol, Former Officials Say
A former NSB director, speaking on condition of anonymity, told Storm Media that while advance security surveys by the bureau chief are standard and necessary before any presidential overseas trip, Tsai had committed a serious operational error by publicizing the mission. "How could he issue a press release and photographs? That directly exposed the president's travel plans," the former director said.
He noted that in previous administrations, NSB directors conducting advance work overseas would go to considerable lengths to avoid being noticed — let alone issue public statements. "You have to protect yourself first in order to protect the president's itinerary," he said, describing Tsai's approach as "completely amateurish."
The former director added that the timing of the disclosure alone would have been enough for any skilled adversary to identify a vulnerability. "From a security standpoint, everything had already been exposed — it was essentially telling the whole world what the president was planning to do and when," he said. He warned that intelligence work depends on controlling even minor details, because adversaries can reconstruct a full picture from a single loose thread. With the NSB director's identity and movements made public, he said, professionals would have had ample material to work with.
China's Calculus And Broader Implications
The Presidential Office was quick to condemn Beijing after the cancellation, and Taiwan's legislature passed a bipartisan resolution denouncing China's actions. Several countries expressed support for Taiwan. But scrutiny has fallen not only on Beijing, but on the national security team that failed to anticipate or prevent the disruption.
On China's decision to apply economic pressure on three African nations to block the overflight permits, the former NSB director acknowledged it as a "ruthless tactic," but noted it also carries costs for Beijing. "All countries in the region will take note," he said. China, he suggested, had calculated that a small diplomatic cost was worth the benefit of maximally obstructing Lai's visit.
The episode highlights the persistent challenge Taiwan faces in protecting its limited diplomatic space — and raises questions about whether missteps within its own security apparatus gave Beijing an opening it might not otherwise have had.
