This paper re-examines previous hypotheses claiming the primacy of a perfect(ive) value in certain qusheng (*-s) derivations (in particular nominalization) in Old Chinese. First, it revisits examples previously cited as having been derived from the perfect(ive), and proposes to re-classify them as resulting from three different derivational processes, nominalization, verb argument demotion, and adverbialization. Second, it focuses on Sino-Tibetan comparative data, in particular from Situ Rgyalrong, a language with severe isomorphism across four -s suffixes. Then, on the basis of morphological (especially stem changes) and syntactic criteria, it sorts out the relationship between the different -s suffixes in Situ, while suggesting multiple sources to account for the diverse functions of qusheng (*-s) in Old Chinese.