I worked for a company for ten years that took my electronic designs and built them in Mainland China. The US company owned the plant. Nearly all the assembly-line workers were recruited from the poor, rural areas. Most all were women. A handful of managers and manufacturing engineers were educated, urbane and well paid - usually from Hong Kong.
The "workers" lived, ate and slept in the compounds about 10 months of the year. Other companies could recruit your workers away if you didn't treat them well by the way.
They took lots of money back home to poor farming villages. They lived better at work than back home. And they didn't have a husband bossing them around. It's not a life you'd ever want, but they were OK with it.
These women went back home once a year flush with cash, and self-confidence. More money than their husbands could ever earn! So, do you think this creates some social pressures bubbling under the surface? You bet!
Add to that the termination of female babies, since families are only allowed one child. Allowed only one, they "punt" until it's a male baby- sad...
Do you think the skew in Male-Female population percentages will cause some problems. I do.
I give them 15 years and all Heck will break out. Can you picture any type of "representative" democracy with 5 times our population? That doesn't sound workable to me. It's hard enough with 300 million like in the US.
I remember an old engineering joke: "large systems fail in spectacular ways".
I predict that the PRC will split into a number of smaller countries based on language differences. Maybe that'll work. Just my thoughts.