Cao Lei 69kg champion Liu Chunhong and 48kg gold medallist Chen Xiexia all tested positive for GHRP - 2 .
Cao Lei won the 75 kilograms category .
Cao Lei , who won the 75 kilograms category , 69kg champion Liu Chunhong and 48kg gold medallist Chen Xiexia all tested positive for GHRP - 2 .