From Inside Gymnastics on Facebook:
FIG announces they’re still investigating the ages of 2000 Chinese Olympians, Yang Yun & Dong Fangxiao, both of whom have, at various times, admitted publicly to be underage at their Games. (Both later said they were mistaken or misspoke.)
Yang is married to 2008 Olympic champ Yang Wei. The couple are currently expecting their first child.
The two came under suspicion after internet investigators started looking into the age of 2008 Olympian Ke Hexin.

The more time passes, the greater the chances are that China will get away with the infraction.
Why did it take so many months to get a legal ruling on whether or not the Olympic statute of limitations had expired?
Certainly the practical solution to prevent age cheating is to eliminate the minimum age of Olympic gymnasts. I don’t have much faith the FIG Disciplinary Commission will bring action.
Washinton Post – Age-old question: Chinese gymnasts under review