If the "Weiqi Game Records Big Complete Collection" described on the page is the same one I have (the middle 4 volumes are advertised by Yutopian here : https://www.yutopian.com/yutop/cat?product=PCCGR2&category=P) the description is a bit inaccurate or incomplete because (a) there are 12 volumes in the series; (b) the series contains approximartely 12,000 game records, not 4,000; and (c) although the main selection of games are from the period from 1980 to late 1998, some of the volumes contain a significant number of older game records (usually, in the back of the book) dating back to the late 1920s.
However, because the link is dead I can't confirm that we are talking about the same series.