People’s Daily Online is China’s mainstream international news website; thus, it is a useful object to consider in determining the communicative validity of Chinese discourse on international affairs. The present research is based on a corpus containing 300 international news articles in 2017, centering on ″China″ as a theme, from People’s Daily Online website. The research entailed a quantitative analysis of the discourse moves at both synchronic and diachronic levels. In doing that, two synchronic reference corpora were built with articles from Washington Post and The Times. These two reference corpora were used for observing the international acceptors’ acceptance inclination. Furthermore, for observing the generic evolution of People’s Daily Online, its news articles in the systematic corpus, published between 2010 and 2017, were diachronically analyzed. It was found that the genre of People’s Daily Online has been steadily stable throughout the 8 years, with features including: ″headlines″ formulated with event elements; ″information source″ identified by dominant institute names; ″event description″ conducted generally and statistically; ″event comment″ subjectively worded by the media itself. Based on Functional Linguistic Theory, further examination of these features indicates that People’s Daily Online tends to construct an unequal relationship between a ″stronger″ broadcaster and ″weaker″ acceptor. This relationship has different effects on broadcasting with centralized information resources as compared to broadcasting with highly open information resources. In the former, relationship is manifested in the equilibrium between broadcaster and acceptor, rather than in equality, while the broadcasting validity is still high. People’s Daily Online as a large-scale official media outlet has the advantage of considerable information resources and broadcasting capital. At the same time, the audiences have limited capability in participation; thus, acquiring information passively is the most effective and economical way for them. This relationship between acceptor and broadcaster is underpinned by the Marxist principles of broadcast communication practiced in China. On the other hand, international audiences, who are mostly accustomed to Western ″commercialized″ news, tend to lose feelings of relativity and interest in the information broadcasted. This repercussion can be addressed through generic strategies such as: introducing lead-in moves such as, subtitles; presenting individual cases in ″event description″ and annotations on cultural backgrounds; increasing the number of quotes from common personalities in ″event comments″. On the other hand, in broadcasts with highly open information resources, the relationship between broadcaster and acceptor has neither equilibrium nor equality. With the development of social informatization, common audiences have acquired more participation capabilities and accordingly they appeal for a more equal relationship with the media. Therefore, the prevailing media-audience relationship falls short of satisfying the audiences’ needs and raises their sense of resistance to information acquisition. In this case, the generic strategies of weakening the institute identity of the media, and offering speaking and communication channels to the audiences can be adopted. Apart from generic stability, the People’s Daily Online also presents generic variations for adapting to the new trends of media integration, as evidenced by slow growth in the usage of the discourse moves, ″event comments″ and ″headlines″. The two-sided generic features generated with the guidance of Chinese Marxism News Conception in complicated communication environment. Chinese media should find a balance between adherence to Chinese news ideology and adaptation to the acceptors’ requirements while promoting the development of Chinese international media discourses that are suited to China’s national conditions. The study offers a validity analysis frame work for China’s international news genre in three levels: analyzing the state of equilibrium between the broadcaster and the acceptor; appraising the validity of the broadcaster; and, subsequently, proposing enhancement strategies based on the Marxist Conception of News. Furthermore, the corpus-based quantitative study provides an objective and empirical method for analyzing abstract discourse structure, and finally ensures the credibility of the conclusions reached in the research.