Chinese scholars have achieved a comprehensive consensus on the disciplinary history of International Relations (IR) in China. However, this collective understanding of the evolution of Chinese IR is problematic because it denies the existence of pre-1949 Chinese IR and mistakenly sets the starting point of Chinese IR to be the mid 1960s, thus providing a progressive image of the IR discipline in China which is historically untenable. This essay rectifies this misunderstanding by reconstructing the history of Chinese IR before 1949. It verifies the existence of pre-1949 Chinese IR by reviewing the IR-relevant institutional setting in Chinese universities before 1949 and comparing the situation before 1949 with that in the mid 1960s, when the three IR departments were established. Further, the essay tentatively explains why pre-1949 Chinese IR has disappeared in the mainstream discourse of the history of Chinese IR. It argues that the interruption of the evolution of IR in China in the early 1950s and the specific power–knowledge interaction mode established in Chinese IR in the late 1950s are the two main causes responsible for the absence of pre-1949 Chinese IR in the history of the IR discipline in China.