Wang and An's identities were revealed when the CSA announced last week that six Chinese swimmers had failed doping tests during the 2015-16 season.
It identified a third swimming as Chinese Navy's Zhao Ying, who also tested positive for Clenbuterol in an out-of-competition test but has not yet been punished.
Clenbuterol is a performance-enhancing substance sometimes found in weight-loss pills that is on the World Anti-Doping Agency (Wada) banned list.
The use of doping stimulants in Chinese swimming caught worldwide attention last week when Wada announced it was investigating claims published by the Times newspaper that Chinese sports authorities were suppressing five positive tests to "avoid a storm".
The Chinese anti-doping agency (CHINADA) denied it was "covering up" the tests, arguing that it was following protocols by protecting the identities of the swimmers while test procedures and hearings were still underway.