More on China and surveillance. Looks like they are already embedding brain sensors in caps and helmets to monitor the workforce. It's called "emotional surveillance"

https://futurism.com/china-emotional-surveillance/

"Kalden is, in fact, the elusive "Wise Man" Ty Gospodinov, the original inventor and founder who came up with the idea for the company. Mae agrees to meet him in secret and he tells her that a totalitarian regime will soon arise if nothing is done to stop it, equating it to a surveillance society. He explains the need for privacy in the digital age and asks her to help him take down the Circle, saying he cannot do it alone. Mae thinks that he is crazy, but pretends to go along with him, but then betrays him by telling the other founders of the Circle what has happened, who ensure that Ty is silenced. The book ends with Mae looking at Annie in a coma at the hospital, wondering when the time will come that the circle will develop enough technology to read people's thoughts, saying that "the world deserves nothing less and would not wait".