A report by Human Rights Watch has revealed details of a mobile app being used by police and other authorities in China’s far west region of Xinjiang to identify target groups for enhanced surveillance and monitoring. The document, released on Thursday, sheds light on the new technologies – from big data analysis to facial recognition and artificial intelligence – employed by China’s security agencies to build an extensive and advanced surveillance system for social control in the predominantly Muslim region. The report said it provides “a detailed description and analysis of a mobile app that police and other officials use to communicate with the Integrated Joint Operations Platform (IJOP)”.