Is technology a superhero or a supervillain? Deepfake videos are becoming popular online, which is raising public concern.
Generative adversarial networks (GAN) are lowering the cost of face-changing technology, allowing everyone to get in on the fun, not just big film companies. But not everyone is creating deepfakes with good intentions. What is a deepfake? Watch the video to find out more.

Video production: Qi Jianqiang
Video editors: Qi Jianqiang, Zhao Yuxiang
3D designer: Pan Yongzhe
Anchor: Zhou Yiqiu
Chief editor: Wu Gang
Producer: Wen Yaru

(Liu Ziwei, assistant professor at Singapore Nanyang Technological University and postdoctoral researcher at UC Berkeley, also contributed to this story by fact checking content.)