The only new Chinese-language account this cluster has found — a self-declared dramatization, Tier 5 — also dates the Twente–Olsder–Song beer story to 1978, not 1975: convergence, not corroboration

chinapopulation-policyone-child-policyhistoriographycontested-causationcold-war-sciencenetherlandscyberneticschinese-language-sourcingtier-5retrospective-memoryunverified

A 2026 Chinese-language popular article, "人口炸弹制造者：搞导弹的宋健与「一胎化」人口政策" ("Population Bomb Maker: Missile Man Song Jian and the 'One-Child' Policy," byline 晓恩说史), narrates the same beer-and-a-paper scene Geert Jan Olsder describes in his own 2024 U-Today account — a paper on optimal population control for a "fictional island," offered over a beer in Enschede — and opens: "1978年6月，荷兰恩斯赫德市。 中国导弹专家宋健，和荷兰数学家奥尔斯德，在一家小酒馆喝啤酒" ("June 1978, Enschede, the Netherlands. Chinese missile expert Song Jian and Dutch mathematician Olsder drank beer in a small pub"). It places the scene in 1978, not the spring 1975 of Olsder's own account. Its closing bibliography lists both Greenhalgh's Just One Child and, as its first entry, a Liang Zhongtang item (《「一胎化」产生的时代背景研究》, 新语丝博客) whose title closely tracks Liang's 2009 essay — so its source chain is not distinct from Liang's 2009 academic essay, which independently dates Song's exposure to a "1978 academic visit to Europe" (already recorded at claim-liang-2009-essay-corroborates-song-jian-1978-foreign-cybernetics-exposure and claim-olsder-1975-account-contradicts-liang-2009-pre-1978-dating).

The finding is bounded by the source's own disclosure. The article opens with a method statement — "本文基于真实历史人物和事件，结合公开历史资料进行艺术化加工创作。 文中对话、心理活动等细节为合理推测" ("based on real historical figures and events... artistically reworked; dialogue and psychological details are reasonable speculation") — a self-declared dramatization with invented dialogue, published under a pseudonym and found only as identical text mirrored on two partisan aggregator sites (bannedbook.org, aboluowang.com), the original 新世纪 posting unlocated. It is Tier 5 by the vault's rubric and sits below the Tier 3–4 sourcing floor for a contested historical date even before its fiction disclaimer is weighed. Its 1978 dating therefore converges with, but does not corroborate, the stronger evidence: Liang's Tier 1 essay, Song's own 1978-dated 1986 self-report (claim-song-jian-1986-essay-quote-dates-cybernetics-exposure-to-1978), and the publication-sequence asymmetry that shows the 1978 record predates Olsder's account (observation-song-jian-1978-self-report-predates-olsder-account). No Chinese-language account naming 1975 was located this session. This note exists so that a later session meeting this Tier 5 source does not re-discover it as fresh corroboration; it is a documented dead end that happens to point the same way as the live evidence.