Following American sprinter Erriyon Knighton's positive test for the banned steroid trenbolone, China's Anti-Doping Agency (CHINADA) has called for intensified testing of U.S. track and field athletes, citing concerns about systemic doping issues. CHINADA criticized the U.S. Anti-Doping Agency (USADA) for inconsistencies in handling doping cases, particularly highlighting that Knighton was cleared to compete after an arbitrator attributed his positive test to contaminated meat. This situation has exacerbated tensions between U.S. and Chinese authorities, especially after revelations that 23 Chinese swimmers tested positive before the Tokyo Olympics but were still allowed to compete. CHINADA urged the International Testing Agency to enhance supervision of U.S. athletes and emphasized the need for global trust in fair play. The agency expressed concerns over the lack of adequate testing for American athletes, with claims that the US has a double standard in doping enforcement. This incident reflects ongoing scrutiny of doping practices within U.S. athletics, raising questions about accountability and transparency.