China draws on the United States' operational experience in the Persian Gulf War and Kosovo War, as well as the growing vigilance towards the wave of the Arab Spring, and it is expecting to emulate Russia's "winning without fighting" experience in the Crimean Civil War. As such, China has used some online platforms to influence the target country's elections in search of its benefits and starting to develop cognitive warfare. In recent years, whether it is for domestic stability maintenance, international competition, or deploying a united front strategy toward Taiwan, China has been utilizing social media for information gathering, propaganda, and even psychological hints to change the perception and attitude of the audience and gain strategic advantages. This study explores the connotation and development of China's cognitive warfare, with a focus on some specific cases during the COVID-19 pandemic to analyze the operational level and strategy of cognitive warfare. This paper provides some insights into the new type of mind-control development trend and proposes some relevant countermeasures.