Greenhalgh's 2008 book names Liang Zhongtang as a key actor six years before the two 2014 books Whyte, Wang & Cai cite as his 'prior research' contribution existed

chinapopulation-policyone-child-policyhistoriographycitation-genealogyliang-zhongtanggreenhalghwhyte-wang-caijust-one-childchronology

Susan Greenhalgh's 2008 book Just One Child: Science and Policy in Deng's China names Liang Zhongtang in Table 1, "Key Actors in the Making of the One-Child Policy," listing "Shanxi Party School: Liang Zhongtang" in the table's Early Deng era (1977–1980) row of Population Specialists — University of California Press, copyright 2008 (claim-greenhalgh-2008-book-table-1-names-liang-zhongtang-as-key-actor). Whyte, Wang & Cai's 2015 China Journal article cites two Liang-authored titles as his "prior research" contribution to the same question, both dated 2014 in the article's own footnotes: Zhongguo jihua shengyu shilun (China Development Press, footnote 15) and Zhongguo shengyu zhengce yanjiu (Shanxi Renmin Chubanshe, footnote 22). 2014 minus 2008 is six years.

This extends, rather than duplicates, claim-greenhalgh-2003-naming-of-liang-predates-liang-2009-and-2014-texts, which clocked Greenhalgh's earlier 2003 PDR article at more than a decade ahead of the same 2014 books. The 2008 book is a second, closer data point in the same direction — and a more pointed one, since it is the text Whyte, Wang & Cai themselves cite as the other half of their "prior research" pairing, not an article they leave uncited (claim-whyte-wang-cai-footnotes-cite-greenhalgh-books-not-2003-2005-articles). It is a distinct bibliographic fact from claim-whyte-wang-cai-cite-liang-2014-books-not-2009-essay, which establishes which Liang text gets footnoted; this note establishes how the two cited "prior research" items are dated relative to each other. The claim rests on two already-dated Tier 1 primary documents read directly by prior vault sessions (the book's own Introduction and Table 1; the article's own footnotes), clearing the sourcing floor for a date-arithmetic claim without qualification.