The purpose of this article is to contribute to the discussion of a much debated topic as to how to understand the impact of new media on Chinese journalism. Based on analysis of materials gathered from industry journals and interviews with journalists, this article analyses the manifestations of de-professionalisation of Chinese journalism from the theoretical perspective of boundary work and journalist’s interpretive communities. It is argued that de-professionalisation of journalism brought by the thriving of new media is manifested by the loss of power in defending the boundary of three domains that are essential to journalism: news platforms, news work and news product. These three domains also constitute the main discourse theme of journalist’s interpretive community. In terms of news platforms, the rise of new media especially the advent of Weibo and WeChat has made various platforms available to the general public, resulting in traditional media’s loss of monopoly over the channels of news communication. With regard to news work, the wide adoption of digital devices has revived the potential of ordinary person to be a reporter, and those working in traditional media are no longer the dominant group in?uencing public opinion. As of news product, the communication environment shaped by new media technology has forced changes to the way newsworthiness is defned, and the values such as “bad news is news” and “no entertaining no news” has gained overwhelming importance. Altogether, these have challenged the authority of professional journalists, resulting in a process of de-professionalism in the arena of news communication.