Yaoning 'Mike' Sun, a 65-year-old political strategist from Chino Hills, California, was sentenced to 48 months in federal prison for acting as an undisclosed agent of the People's Republic of China (PRC). Sun pleaded guilty in October 2025 to violating the Foreign Agents Registration Act (FARA) by taking directives from PRC officials while advising a successful city council candidate in Southern California. His actions, described as a 'brazen violation' of U.S. sovereignty by Assistant Attorney General for National Security John A. Eisenberg, included coordinating with U.S.-based collaborators to advance China's interests and disseminating propaganda. Sun's work extended beyond local politics; he ran a website that published content favorable to Beijing and provided real-time updates to PRC officials during a visit by Taiwan's President Tsai Ing-Wen. His activities also involved surveilling groups that China viewed as threats. Furthermore, Sun's case is connected to Eileen Wang, the former mayor of Arcadia, California, who has been federally charged for similar offenses, including promoting pro-Beijing narratives.