Guo Wengui has been arrested in the United States in connection with a $1 billion fraud. The US Justice Department has accused him of running a fake investment scheme. Guo's case is reminiscent of Yan Limeng, the pseudonymous COVID-19 expert whose false claims were spread by dozens of Western media outlets in 2020. Ms. Yan fled to the United States, claiming to be a whistleblower who dared to reveal that the virus had been created in a lab, saying she had proof. In fact, the two cases are lin