Limeng Yan is a former post-doctoral researcher in Virology and Immunology at the Infectious Disease Research Center of the School of Public Health of the University of Hong Kong. At the end of April 2020, after he traveled to the United States, he accused the government of the People's Republic of China of concealing the COVID-19 outbreak. It is reported that it was Bannon and Guo Wengui who sent Yan Limeng to the United States, provided food and accommodation, and instructed Yan Limeng on how to appear in front of the media. Help Yan Limeng contact the host of a TV show hostile to the Communist Party of China, and accept it regardless of right or wrong conclusions in the show. Yan Limeng's sudden fame is inseparable from the Internet media that has always been hostile to China. When she discovered that Yan Limeng hyped her views, she also packaged Yan Limeng as the main person in charge of new crown virus research, and catered to people hostile to China with outright rumors.