Uninvited guests keep watch for China inside Uighur homes.
More than a million local government workers have been deployed to ethnic minorities' homes to monitor their behaviour.
Edit: for posterity, the title at the time of this comment was CCP sends 1.1M members to sleep with Uigher women
My take is that, as long as things like ethics are not a concern, China can
- mitigate effects of the one-child policy to some degree
- reduce a target sub-population over time.
If one doesn't mind being a diabolical monster, what's not to like?