Hikvision (and Dahua & others) have been added to a US blacklist that prevents them from purchasing / using US components:
US bans Chinese company behind 1.3m UK CCTV cameras over spying allegations
Pressure mounts in UK to take action over blacklisted Chinese CCTV firm...
Just FYI:
Ban of Dahua and Hikvision Is Now US Gov Law
All the details of these developments in the US are contained within the article (click the image or the link above).
HikVision and Dahua amongst others have been named in a draft US Government bill potentially banning their use in future projects at government sites.
Although this news story broke more than a week ago, there hasn't been much coverage of this on our side of the pond.
So, just a quickie here...