Compared with similar research mainly focusing on the Belt and Road Initiative (BRI) in Australian mainstream media using discourse analysis, this paper explores the reasons for the narrative shift by conducting semi-structured interviews with leading and well-known Australian narrative producers. This paper takes two conditions as a given. Firstly, the BRI narratives in Australian mainstream media shifted in tone from mostly positive to highly critical. Secondly, the Australian mainstream media's increasingly negative attitudes towards the BRI are essentially not just about the BRI but the Chinese government. Based on my analysis and interviews, this paper makes contributions by filling in the gap of finding out reasons to explain this narrative shift. More concretely, this paper finds out that while mainstream media is influential in many areas of national policy making, mainstream media reporting on foreign affairs is less so. By comparison, the Australian government's BRI or China policy has a significant impact on Australian mainstream media reporting. This narrative shift has been driven by international politics and Australia's China policy, influenced by Australian audiences’ preference of local news and their local position, and its democratic responsibilities. Meanwhile, the vagueness and constant changing characteristics of the BRI do not help the understanding of the BRI in Australian media.