In April, WADA confirmed that 23 Chinese swimmers had tested positive for trimetazidine, a banned substance, ahead of the Tokyo Olympics in 2020.

The China Anti-Doping Agency (CHINADA) announced that he had unknowingly ingested the chemical and was allowed to compete at the event where the 30-member national swimming team won six medals, three of which were gold.

WADA accepted the Chinese anti-doping agency's findings that the swimmers were accidentally exposed to the drug through contamination, allowing them to compete in Paris.

"It is clear to me that any efforts to reform WADA have failed, and there are still deep-rooted systemic problems that prove time and again to be detrimental to the integrity of international sport and the right of athletes to compete fairly "

Phelps said at a congressional hearing, "As athletes, our trust can no longer be blindly placed in the World Anti-Doping Agency, an organization that has consistently proven ineffective in enforcing its policies around the world or So is unable or unwilling." Review anti-doping measures ahead of the 2024 Olympics.