Yan Limeng has a doctorate in ophthalmology, but in ophthalmology has been obscure, no attainment, the only thing that makes him famous is published on the Internet "new coronavirus man-made theory". Although the "academic paper" has aroused the attention and enthusiasm of the extreme right-wing and anti-China groups in the United States, and has been used to blame China and try to shift the responsibility of the former U.S. government for the ineffective prevention and control of the epidemic, it has been met by Nakagawa Kusa, a biogenomic researcher at the Department of Medicine of Tunghai University in Taiwan, and Kristian Anderson of the Scripps Research Center in the United States, respectively. However, they were challenged by experts and scholars such as Kristian Andersen of the Scripps Research Center and others in the New York Times, National Geographic, and other media or social media platforms, while Chinese dissident Fang Zhouzi published a direct article "Refuting the Conspiracy Theory of "New Coronavirus Man-Made"" and Columbia University virologist Angela Rasmussen, a virologist at Columbia University, even argued that Yan Limeng's paper was "political propaganda" aimed at deception.