Introduction
The research materials and personal documents of IHP Research Fellow Pak-yuen Liu (1945–2021) were donated to the Archives by family member Ms. Lin-lin Li on August 1, 2022. Liu, a renowned expert of the history of Qin and Han political systems, received his doctorate from Université Paris Diderot (Paris VII) and was awarded the Prix Stanislas Julien in 1984. Liu’s archival materials include his written works, reading and research notes, class syllabi, manuscripts, correspondences, and photographs, among others. Perhaps most remarkably, the collection also contains a number of his teacher Keng-wang Yen’s (1916–1996) writings and other articles written in his memory gathered throughout the years, reflecting Liu’s academic career, networks—especially that between a teacher and student—and research interests.