The Warning
Testifying before the Legislative Yuan's Foreign Affairs and National Defense Committee on July 7, National Security Bureau Director-General Tsai Ming-yen told lawmakers that China has built a "nationwide digital surveillance network centered on the Skynet surveillance system, as well as the Sharp Eyes program," capable of tracking individuals through biometric data, hotel registrations, mobile phone location records, and transportation logs. Facial recognition — and in some cases gait recognition — is layered on top. Tsai's message was blunt: Taiwanese travelers who fall under Beijing's definition of undermining "ethnic unity" can now be identified, located, and detained using infrastructure that already blankets Chinese cities.
A Statute Built on Undefined Terms
The legal hook is China's Ethnic Unity and Progress Promotion Law, passed by the National People's Congress on March 12, 2026 by a vote of 2,756–3–3, and which took effect July 1 (NPC Observer). Beijing's own Ministry of Justice describes it as strengthening "law-based governance in ethnic affairs" across the country's 56 officially recognized ethnic groups (en.moj.gov.cn). Taiwan's Mainland Affairs Council has flagged the operative problem: the law criminalizes acts that "undermine ethnic unity" or are "detrimental to ethnic unity and progress" without defining either phrase, a vagueness MAC deputy head Liang Wen-chieh said "lack[s] clear definitions" and invites self-censorship (Focus Taiwan).
Taipei's own legal analysis, relayed to the legislature, identified eight categories of people exposed to enforcement under the law — including Taiwanese officials and ordinary citizens, who Taiwan officials say could face detention on separatism charges under Article 63 (Taipei Times). MAC has also pointed to a precedent that makes the risk concrete rather than theoretical: it has documented cases of Taiwanese travelers questioned or detained in China or Hong Kong over old social media posts, including ones supporting Hong Kong's 2019 protests.
Steelmanning Beijing's Case
It is worth taking the official framing seriously before dismissing it. Every state asserts some authority to screen travelers and residents against security risks using biometric and travel data — the US collects biometrics at the border through CBP and OBIM, and the EU's Entry/Exit System will do the same. China's National Ethnic Affairs Commission frames the law as economic and social policy: a five-year plan to promote integration and shared development in minority regions, not a targeting mechanism. The NPC's near-unanimous vote (2,756 in favor against 3 opposed) also reflects genuine domestic consensus that ethnic cohesion is a legitimate state interest, and no government — including democracies — is obligated to let foreign nationals cross its border unconditionally.
Why Vagueness Plus Mass Surveillance Fails Proportionality
The steelman collapses on the details Tsai and MAC actually raised. A border-security regime built on defined offenses, individualized suspicion, and judicial review is categorically different from one that pairs an undefined liability standard — "undermining ethnic unity" — with population-scale biometric tracking and no independent court to test the charge before detention. Skynet and Sharp Eyes were not built for this law; they are general-purpose surveillance systems that the law now gives explicit legal cover to trigger on political speech, including speech made years earlier and outside China's borders. That is the definition of a chilling effect, and MAC's documented Hong Kong-protest cases show it already operating in practice, not hypothetically.
The extraterritorial reach compounds this. A Taiwanese national posting from Taipei about Hong Kong's 2019 protests, or a foreign academic publishing research Beijing dislikes, now carries default legal exposure the moment they set foot in Chinese jurisdiction — with the exposure defined after the fact by whichever official reviews the Skynet dossier. That inverts the rule-of-law sequence democracies rely on: define the conduct, then investigate, rather than surveil everyone, then decide retroactively what counts as a violation.
Taipei's Response Is the Right Model
Commendably, Taiwan's Executive Yuan has not answered with reciprocal overreach. Premier Cho Jung-tai's July 2 announcement set up a three-pronged, calibrated response: an interagency platform led by the Ministry of the Interior, Ministry of Justice, and Mainland Affairs Council to protect citizens; a Foreign Ministry push to coordinate with "other nations and democracies worldwide"; and public-awareness efforts to help travelers understand the actual risk before they fly (Executive Yuan). That is proportionate: transparency and international coordination, not a blanket travel ban or a mirrored surveillance statute of Taiwan's own.
The Broader Stakes
For an open-internet, pro-speech publication, the lesson travels beyond the Strait. Skynet and Sharp Eyes are not new — what changed on July 1 is the legal plumbing connecting a pre-existing biometric surveillance grid to an undefined political offense with cross-border reach. Democracies weighing their own biometric border and travel-data systems should treat this as the cautionary case for keeping surveillance triggers narrowly and publicly defined, reviewable by courts, and confined to conduct — not sentiment — before mass tracking infrastructure gets a legal green light to act on it.