The emergence of the Internet and social media provides a new platform for information diffusion, promoting the interaction among relatively independent participants in the opinion market and changing the balance of the intrinsic mechanism and external dynamics based on political communication. In this way, it is necessary to investigate the new interactive landscape of political communication and political discourse regarding digital media. In this study, we conduct a social and semantic network analysis of the dissemination and public opinion generation landscape of the COVID-19 “New Ten Articles” policy communication by the Chinese government, exploring the network relationships and emotional value interactions behind the contact of a new public policy in China. The results show that, in the political communication system, the influence of information’s position in the communication field has surpassed the information source impact, and the power of network opinion leaders is significant; the policy communication network presents a situation of “identity status circle” division, and the information circle connection presents a trend of fracture and barrier thickening, which may cause policy information alienation and social opinion polarization risk; the imbalance between policy information supply and public demand is further enhanced, and the negative emotion “cloud” is distributed on a scale and condenses into grassroots social governance pressure; and the content released by some key opinion leaders, experts, online media, and local mainstream media accounts is significantly correlated with network emotions. These emotions continue to spread in subsequent discussions, and to some extent, influence the formation process of political public opinion.

The development of digital technology encourages culture to spread more inclusively and diversely around the world. On this basis, this article aims to reveal the changing trend and the dynamic mechanism behind Chinese cultural communication by studying the status quo of overseas communication in the media, education, and arts and the influence of Chinese culture in different regions. The research shows that the existence of cultural hegemony and unilateralism in Western countries and the incomplete of China's communication system have restricted the global communication of Chinese culture. Despite this, globalization and multi-polarization provide new external opportunities for Chinese cultural global communication. Also, the development of China's comprehensive strength and technology have laid the material foundation and broadened the channels for cultural communication. In the future, more revolutions in terms of cultural communication concepts, subjects, and matrices should be conducted to help Chinese culture be more widely recognized and accepted worldwide.