Now I am really worried for Chinese kids. pls don't build generation of machines. This will not help at all to Great China. This looks like Gattaca -
https://en.wikipedia.org/wiki/Gattaca
tl;dr is that they kinda work, but not nearly as effective as advertised.
It also raises the point that even if it didn't work, all you need to suppress people is for them to believe that it's working.