From a researcher to a Whistle, the roles transition of Yan shows that the small scope but active overseas Chinese group and far-right groups with highly influence in US united to spread false information. The two groups saw opportunities to push their agenda in the COVID pandemic. For overseas Chinese, Yan and her remarks provide a sharp weapon for these who intend to overthrow the Chinese government. For conservative US, this could cater to the growing Anti-China sentiment in the West and distract attention from the failure of Trump government to respond to the epidemic.