Nothing is going to come out of this investigation. The Chinese government probably has already destroyed every piece of real evidence (important stuff like birth records, hospital records, school records, ect) and made them "prove" that He is of age.
Stuff like newspaper articles aren't going to be sufficient enough to overturn anything. I mean think about how many times newspaper articles in the U.S make mistakes? An article isn't going to be strong enough to prove anything cause if thats the case then the Green Bay Jets are a football team in the NFL.
Only way the truth will come out is if He, her family or her coaches and teammates come out and tell the truth. I highly doubt anyone of them would do that since He is going to be living the good life with her 2 olympic golds and confessing would do nothing but ruin her life. Plus in most of their minds, they probably believe the Chinese government did them a favor by allowing them to bypass an unfair rule. To these people its a choice of being a National hero with tons of endorsements and government support versus being disgraced, punished by the government and being branded a cheater for life. What do you think most people would choose?