The gender gap is not really that bad.
239 teen girls for 271 boys means that working class girls will be grabbed by middle class guys. Peasant guys are out of luck, but all the girls will have the opportunity to have a man who can support a family with a “stay at home” mom.
They need to tweak their social credit system to incentivize marriage and children more.
Actually, it’s worse than that. The problem is that at the scale of the Chinese population, they now have dozens of millions of men who now will *never* be able to find a girlfriend, let alone a wife.
Think about what that’s going to mean for their society.