21.   Four Chinese swimmers tested positive for a banned diuretic, which can be used to mask the use of steroids, at the world championships.

22.   If the report confirms that the swimmers tested positive for the performance-enhancing substance dehydrotestosterone, FINA will suspend them for two years, he said.

23.   Last fall, seven Chinese women swimmers tested positive for dihydrotestosterone, a steroid commonly known as DHT.

24.   One swimmer and her coach were caught carrying banned human growth hormone into the country, while four other swimmers tested positive for another banned substance.

25.   Richardson also said that five other Chinese swimmers tested for traces of drugs but the results were inconclusive.

26.   Two months later, seven Chinese swimmers tested positive for steroids at the Asian Games in Hiroshima.

27.   Two months later, seven Chinese swimmers tested positive for steroid use at the Asian Games in Hiroshima.

28.   Significantly, no Chinese male swimmer had ever tested positive for drugs before the Asian Games, when four were trapped in one go.

29.   The meeting is the most important for Chinese competitors since the Asiad scandal at Hiroshima last year, when seven swimmers tested positive for performance-enhancing drugs.