A new surveillance technique is being used by Chinese authorities in a secret hunt for Tibetans from Nagchu. The Tibetan Centre for Human Rights and Democracy reports that police are using code words to monitor the movement and activities of Tibetans, bringing Nagchu Tibetans in Lhasa under 24-hour police surveillance. Police officers constantly share information about peoples’ whereabouts making it convenient for the authorities to immediately arrest potential “trouble makers”.