In the Xinjiang autonomous region, China has taken mass surveillance to the extreme. Using sophisticated technology, police track down every move by Uighurs and other Turkic and Muslim minorities in the name of counterterrorism.

Maya Wang, China researcher at Human Rights Watch, deciphers the methods used by the authorities. She calls for an international and independent investigation in Xinjiang, but how do we convince China to accept it? The question is just whether there is the will to do so in the Human Rights Council.