From the Washington Post:

These marketing presentations, posted to a public-facing Huawei website before the company removed them late last year, show Huawei pitching how its technologies can help government authorities identify individuals by voice, monitor political individuals of interest, manage ideological reeducation and labor schedules for prisoners, and help retailers track shoppers using facial recognition.

The posting page does not give me a way to put the URL up here, but this is the title:

Documents link Huawei to China’s surveillance programs