Qin & Wang's 2017 peer-reviewed study independently dates the Yicheng two-child pilot's start to 1985, not 1980

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Yu Qin and Fei Wang's "Too early or too late: What have we learned from the 30-year two-child policy experiment in Yicheng, China?" (Demographic Research 37, article 30, pp. 929–956, October 2017) states that Yicheng "was the only jurisdiction with a persistent two-child policy since 1985," and restates in its conclusion: "we studied the two-child policy experiment implemented in Yicheng beginning in 1985." This is a peer-reviewed, named-author article in an open-access demography journal — a quantitative/historical-date claim clearing the Tier 1–2 sourcing floor with room to spare.

This bears directly on question-verify-yicheng-pilot-start-date-yan-wei-li-zhang-2014, the five-year conflict recorded in claim-whyte-wang-cai-and-liang-disagree-on-yicheng-pilot-start-date between Whyte, Wang & Cai's 2015 essay (dating Yicheng to 1980, attributed to Yan Wei & Li Zhang's 2014 re-examination) and the vault's Liang Zhongtang seed note (dating it to July 1985, per claim-liang-zhongtang-1979-two-child-proposal-and-1985-yicheng-pilot). Qin & Wang's 1985 date is not sourced to either party to that conflict: no sentence stating it cites Liang's own retelling, and none is Whyte-Wang-Cai's gloss on Wei & Zhang. The date is stated in the paper's own voice, without a citation, and repeated across its abstract, introduction, policy-background section and conclusion. The independence is bibliographic rather than absolute, though: Qin & Wang cite Wei & Zhang (2014) twice — among the prior studies comparing Yicheng's demographics (p. 930, with Gu & Wang 2009 and Wu 2014) and for the policy's operational rules (p. 932) — and they cite two of Liang's own 2014 monographs elsewhere in the paper. They read both sides; they simply do not footnote either for the start date.

This narrows, without closing, the underlying conflict: a second independent Tier-1 source now sits on the 1985 side, against the one Tier-1 source (Whyte, Wang & Cai, reporting Yan Wei & Li Zhang's finding at second hand) on the 1980 side. Yan Wei & Li Zhang's own 2014 article — the one document that could state definitively which figure is actually theirs — remains paywalled and unread.