China has some of the world's most advanced surveillance systems. They use facial recognition technology to collect people's data without their consent and track "suspicious" individuals, such as people from minorities disliked by the government. To protect people's privacy and security, four graduate students from the University of Wuhan have recently invented a low-cost "invisibility cloak" that hides the wearer's identity by creating an unusual heat pattern. And tests have confirmed that it works - it allows the human body to be hidden from cameras monitored by artificial intelligence. I feel that cameras with facial recognition software may have some advantages, such as discouraging people from committing crimes and making it easier for police to find criminals. But at the same time, they are dangerous to people's privacy and freedom. It’s easier for the government to track and control people, and during the recent wave of anti-lockdown prote...