HONG KONG—Teachers who backed antigovernment protests in the city—by taking to the streets or supporting the demonstrators on social media—are being reprimanded and, in some cases, fired as China’s Communist Party increasingly moves to stamp out dissent.
Many observers say they fear the tradition of liberal education and critical thinking in what has been a major world financial center will be supplanted by Chinese-style pro-government lessons and suppression of political discourse. Pressure has mounted since Beijing imposed…