On 3rd September 2017, the swimmer LIU Zixuan (CHN) was tested positive to the prohibited substance Hydrochlorothiazide (Class S.5 Diuretics and Masking Agents) following a doping control test conducted during the 13th National Games of the People's Republic of China.

An additional investigation was conducted by CHINADA.

A sanction of three (3) years’ ineligibility period has been imposed on the swimmer Liu Zixuan. The ineligibility period started on 6 September 2017.

Furthermore, additional sanctions were imposed to the following supporting personnel.
- FANG Chao (team doctor): 4 years
- XIAO Qian (assistant coach): 4 years
- LI Guojun (administative staff): 4 years
- LIU Haitao (coach of the swimmer): 3 years
- BAI Yunfeng (administative staff): 2 years
- MENG Binglin (administative staff): 2 years
- YANG Xiangang (administative staff): 2 years