As Taiwan’s opposition leader, Cheng Li-wun leads a senior Kuomintang (KMT) delegation across China this week, complete with ceremonial stops at the Sun Yat-sen Mausoleum and high-level meetings in Shanghai and Beijing, the fine line between opposition outreach and quasi-diplomacy is being deliberately blurred.

It is an issue that should concern anyone with a stake in Taiwan’s democratic integrity.

The KMT has not been in power for a decade, having lost the last three presidential elections to the Democratic Progressive Party (DPP). It does not control Taiwan’s foreign policy, nor does it carry a public mandate to negotiate, even informally, with foreign governments including the Chinese Communist Party.

Yet this tour, titled the 2026 Peace Visit by KMT officials and framed by Beijing as a constructive channel for peaceful engagement, risks creating exactly that impression: that Taiwan speaks, legitimately, with multiple, competing political voices on the world stage.

The KMT’s efforts in this regard are not diplomacy, but confusion by design with the party on April 8 saying Cheng had “stated that the trip contributes to regional security and stability, reaffirms the continued relevance of the political foundation of the “1992 Consensus” and opposition to Taiwan independence.”

Pretend diplomacy with none of the accountability

In the days and weeks leading up to the China visit by Cheng, the KMT played the trip off as a non-governmental visit aimed at reducing tensions. But when a political party leader meets senior regional leaders in any foreign country, tours industry sites and reportedly seeks talks directly with Chinese President Xi Jinping, they are overstepping the mark.

Such moves can only be undertaken by representatives of the government in power – in this case the DPP. As such, the moves by the KMT are little more than play-acting at diplomacy, with none of the democratic accountability that comes with it.

By referring to the so-called 1992 Consensus, the waters are further muddied. While the KMT points to the ‘Consensus’ as a pragmatic formula upon which to base dialogue, its premise being that both sides belong to “one China” – it is essentially aligning with Beijing’s long-term objective of absorbing Taiwan politically.

This position sits uneasily with both political and public opinion back in Taiwan, with the much-respected National Chengchi University polls repeatedly showing a strong and growing Taiwanese identity across the islands governed from Taipei, as the overwhelming majority of its 24mn citizens reject any Communist Party illusion of “one country, two systems”.

Beijing’s influence over the KMT

None of this is happening in a vacuum though. Beijing has spent years refining its “grey zone” tactics – the ongoing, albeit subtle and usually deniable methods aimed at reshaping Taiwan’s political landscape without resorting to open conflict.

These methods include tactics including, but not limited to, targeted hospitality of minor political players in Taiwan and curated access aimed at elevating the ego of sympathetic parties while isolating others.

Cheng’s visit fits squarely into this pattern in it being a high-visibility platform for her to enjoy as state media across China puts her carefully choreographed engagements on the evening news or front page of the next day’s papers.

Unfortunately for her, however, the public back home are far more wary of her trip given the revelation just days prior to her visit, that a DPP aide of Taiwan’s Presidential Office Deputy Secretary-General, had admitted to spying for China and passing photos of classified documents to his masters in Beijing.

In 2024 and 2025, Taiwanese prosecutors brought multiple cases involving alleged Chinese infiltration efforts at varying levels of society. Among these cases were retired and active-duty military personnel accused of passing sensitive information to their mainland handlers. Local officials in Taiwan have also been investigated for cultivating ties with Chinese intelligence networks at the grassroots level.

Taken together, these cases point to a sustained campaign of espionage by Chinese forces to infiltrate Taiwanese politics as it works to tug away at Taiwan’s political and social fabric. That the leader of the opposition should reward China by visiting just days after the latest case was revealed speaks volumes of the KMT, but also of the ruling DPP.

The DPP’s quiet acquiescence

DPP criticism of the Cheng trip has been sharp at times. Senior figures have warned quite rightly that the KMT lacks any mandate whatsoever to discuss Taiwan’s future, and her efforts to do so risk undermining Taiwan’s sovereignty. Yet beyond the rhetoric played out in domestic media, the DPP response has been limited – at least on the surface.

There are no meaningful constraints on opposition figures engaging foreign governments. Additionally, there is no clear legal framework defining where party diplomacy ends and national representation begins although only the sitting government as led by the president and the executive branch is able to formally represent Taiwan in official diplomacy and/or sign agreements.

To this end, the KMT visit led by Cheng can only be seen as an informal visit by an opposition leader.

Furthermore, following the basics of national security laws, any moves by the KMT to share classified information while in China or to coordinate with Beijing to such an extent that it would undermine Taiwan’s state security can – and should be – investigated or prosecuted.

But while true democracies thrive on pluralism, they also depend on coherence, particularly in foreign policy. As such, when rival parties conduct parallel outreach to an adversary as is seen in Cheng’s China trip, the result is not one of healthy debate, but rather of ambiguity that could at a later time be manipulated or misunderstood. And Beijing is very good at exploiting ambiguity.

A question of political maturity

Supporters of the KMT will of course argue that engagement is necessary and that dialogue with adversaries reduces risk. There will also be claims that backchannels in any area of potential conflict have historically played a stabilising role. This is correct, but context matters.

Taiwan is not dealing with a neutral counterpart. It is dealing with a government that refuses to renounce the use of force and one that conducts almost daily military operations around Taiwan while openly seeking what it calls ‘unification’. In this regard, unsanctioned political outreach is not harmless. It is a device of possible leverage to be added to the Chinese toolbox.

The deeper issue here therefore is not whether or not opposition parties should be permitted to engage internationally - they should. Instead, it is whether they should be allowed to do so in ways that blur the line between partisan activity beneficial to an adversary and national representation.

Right now, that line is dangerously thin.

For the last decade since the DPP came to power, Taiwan’s democracy has been one of its greatest strengths. But it also makes the country a target – of the Chinese Communist party.

Allowing the KMT to act as an alternative diplomatic channel to Beijing risks undermining that strength from within. Such moves by the KMT create openings for Chinese influence while muddling Taiwan’s international voice and handing Beijing exactly what it wants: a divided polity speaking in competing voices.

If Taiwan’s DPP is serious about safeguarding sovereignty, it needs to move beyond mere criticism of the KMT, and establish clear rules of how and to what extent opposition parties can engage foreign governments – friend or foe.