UniTree produces humanoid robots for around 12k a pop already. These types of robots can already do lots of useful jobs that humans used to do. It's not some future thing that requires breakthroughs, it's happening already. Here's one example https://peertube.mesnumeriques.fr/w/jNakB3B5dRoeJkShnVRgDk
This tech is rapidly improving, and it's only going to keep getting better going forward which means robots taking over an increasingly wide range of manual labour. Machine learning is also advancing rapidly right now, and new things are being figured out every day. These types of breakthroughs are happening on monthly basis right now https://github.com/sizhe-li/neural-jacobian-field
The whole point of having a dictatorship of the proletariat established, which is what it means to be a socialist country, is to ensure that final decision about the way technology is used isn't in the hands of capitalists. Yes, China has capitalists, and exploitative forces, but they're not in charge, and they are subordinate to the proletarian state.