Rule of law as institutional substrate — contract enforcement, judicial independence, equal treatment before the law. Upstream of most other axes.
Martial law declared in Beijing 20 May 1989 in response to student- led demonstrations in Tiananmen Square; PLA troops cleared the square 3-4 Jun 1989 with casualties estimated hundreds to thousands. Zhao Ziyang purged as General Secretary 24 Jun 1989; Jiang Zemin elevated from Shanghai. Political outcome froze political-reform trajectory, triggered Western sanctions, and reshaped CCP cadre selection around regime-stability prioritisation.
Per invariant 3, reforms are scored by what they did on each channel-separated axis, not by the party that enacted them. This fingerprint is how the policy-match engine finds historical analogues.
Explicit links are curated by the author. Inferred links are hypotheses in the library that test the same axes this policy moved — the framework's answer to "what does the data say about a policy like this?".
Ranked by axis-fingerprint overlap with this policy. Direction match bolded — those are the closest historical analogues. Shape of the match is what drives policy-outcome comparison, not the country or party label.