They were suspiciously young during the Sydney Olympics too

Thought that the Beijing games was the only time China might have used underaged gymnasts? Think again! Two athletes who participated in the 2000 Sydney Olympics have had an investigation into their ages turned over to the International Gymnastics Federation (FIG)'s disciplinary commission. Questions of Dong Fangxiao and Yang Yun's eligibility first rose during the FIG's probe into the Beijing Olympics team, when Dong's birthdate changed from 1983 to 1986. This would have placed Dong at 14 in Sydney. Meanwhile, Yang accidentally let slip in a CCTV interview that she was also 14 in Sydney, though she later told the AP that she had mispoken. Both could have their results wiped out from the Sydney Games, but it is up to the International Olympic Committee whether they would lose their medals. Source: AP