Several online records and reports show He Kexin, the host nation's top competitor on uneven bars, and Jiang Yuyuan might not yet be 16, the minimum age for Olympic eligibility. Both were chosen for China's team.
There is also the question of Yang Yilin, a medal favorite, who may be 14 based on registration records. Yilin's date of birth was changed on the 2007 registration list, making her eligible.
Why is this a feminist issue? Because children's rights are human rights and child labor laws should not be violated, here or internationally. But China is notorious for violating child labor laws.