China's Ministry of State Security says fraudsters may stay silent after a call connects to trick the person who answers into speaking, since just a few seconds of voice can be enough for AI voiceprint cloning used to impersonate them in scams. The ministry said AI is turning hard-to-change biometrics — voiceprints, faces, irises and gait — into data that can be collected, copied and reused, shifting the risk from simple data leaks to deepfakes such as cloned "digital doubles" built from a photo plus seconds of audio, or inferring age and emotional tendencies from face and gait data. It also noted that China's Supreme People's Court treats serious illegal acquisition, sale or provision of personal information such as face photos and videos as a criminal offence, and advised following a "do not provide unless necessary" rule.