This paper briefly introduces the intellectual background of “relational turn” brought about by poststructuralism, the origin, Chinese translation, main meanings of the idea of assemblage, its contribution and restriction and the main contents of six papers in this special issue. In favor of easily understanding assemblage and its backdrop of Deleuze-Guattari philosophy and actor-network theory (ANT), the paper briefly explains the concepts of “multiplicity”,“territorialization/deterritorialization”, “intensity/extensity/quality”, “the virtual/the actual/the real”,“rhizome/arborescent schema”, “becoming”, “agency”,“object”, “actor/actant”, “enact”, “translation”, “flat”, and “symmetrical”.