US Patent 10885160 User classification

A computer-implemented user classification method includes: obtaining, by a target terminal device, an initial user classification model from a server, in which the initial user classification model is provided by the server to multiple terminal devices, the multiple terminal devices including the target terminal device; obtaining first operation data of a registered user of the target terminal device; updating the initial user classification model based on the first operation data, to obtain an updated user classification model that is personalized for the registered user; and classifying, based on the updated user classification model, an identity of a current user of the target terminal device.