Since the 1970s, research results on China’s modern public domain have emerged one after another. The public sphere of modern China is not a single whole. Newspaper, the mediated public sphere, also has the distinction between mainstream and margin. Modern Shanghai tabloids occupy an important position in the history of Chinese newspapers. By defining new problems, incorporating new roles, and constructing new discourses, alternative public sphere defines “private issues” that are not within the scope of mainstream public discussion as “public issues”. The paper analyzes the reports of the modern Shanghai tabloid on the issue of “expulsion shacks” and finds that the modern tabloids have constructed an alternative public domain with a certain class nature, representing the interests of specific classes. Tabloids rely on inflammatory rhetoric to attract a wide audience, establish and maintain similar cultural identity and promote political power.