Mash-up videos of beloved characters from Chinese classics — some made with A.I. — have caught the attention of the authorities.

A Chinese businesswoman who had a close relationship with Jensen Huang was found to be passing intelligence to Beijing. President Trump was briefed and took no action.

© Manuel Orbegozo for The New York Times

A.I. has uncovered a horde of software flaws, which engineers are racing to fix before they can be exploited and abused by hackers.

© Ariel Davis