A named academic reviewer of the standalone Ma Yinchu excerpt volume from Liang Zhongtang's 2014 book quantifies its Ma Yinchu content at over half its pages, and also never mentions Song Jian

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Liu Shejian (刘社建), a researcher and doctoral supervisor at the Shanghai Academy of Social Sciences' Institute of Economics — Liang Zhongtang's own home institution — published a 2015 review of 《马寅初考》 (An Investigation of Ma Yinchu), the standalone volume a Douban review says reproduces the two "most-discussed" chapters of Liang's 2014 book (see claim-liang-2014-book-most-discussed-content-is-ma-yinchu-not-song-jian). Liu writes that "more than half of An Investigation of Ma Yinchu's pages are devoted to demonstrating that Ma Yinchu's criticism at the time had no connection to Kang Sheng and Chen Boda" — a specific, quantified figure from a named critic, rather than an anonymous reader's impression. The figure measures the space given to that one sub-thesis, not to Ma Yinchu material in general — the book is titled 《马寅初考》, so the general reading would need no number. The roughly 1,800-character review, which discusses Mao Zedong, Kang Sheng, Chen Boda, and the historiography of the "one man wrongly criticized, three hundred million wrongly added" myth in detail, never mentions Song Jian.

This corroborates, from an independent and higher-tier source, the same absence recorded in the matching-titled essay above: two separate direct engagements with the excerpted Ma Yinchu material now agree Song Jian is essentially absent from it. Liu's own stated motive for reviewing the book — opposition to both the one-child and two-child policies outright — is on the record in the review but was not treated as load-bearing for the quantitative claim it also carries.