Sun Yang to swim at China championships after doping ban
Sun, 33, returned to competition last year after serving a four-year ban for smashing vials of blood during a 2018 doping test, the circumstances of which he still disputes.
He also served a ban in 2014 after testing positive for a banned substance.
China's week-long national championships in Shenzhen are the country's sole qualifying event for the World Aquatics Championships in Singapore in July and August.
Sun will be ineligible because the Chinese Swimming Association (CSA) forbids those who...