The ”General Index to the Siku Quanshu” can be generally divided into two systems: the Wuyingdian edition and the woodblock Zhejiang version of Hangzhou. The former is officially accepted as the standard by the imperial court, but very few copies survive. The latter, carved for bureaucrats of the Zhejiang area, is the more influential edition due to its wide circulation. Critics believe that other editions are mostly derived from the two, but what concerns us most is whether the Zhejiang version is based on the Wuyingdian edition, a debate which has been around for several decades. This paper seeks to examine how the recently discovered textual materials are to shed light on this issue and affect our view of it. I contend that the assumption that the Zhejiang version is derived from the Wuyingdian edition is untenable. The Wenlange manuscript of the Siku Quanshu is more likely to be the primary (though not the sole) source of the Zhejiang edition, which also uses other revisions of the ”General Index” later than the Wuyingdian edition.