Just when I wrote that Sailfish OS could be an - in my humble opinion - interesting option for HTC to use it as the underlying OS for its rumored Chinese market mobile OS; which HTC is said to work with the Chinese government as a Google, Apple and Microsoft free alternative; a photo made its way to Weibo (the Chinese version of Twitter) which is said to be a kind of home screen of this Chinese HTC OS. Clearly running on a black HTC One, it seems to be a mix between Android and HTC Sense 5 and Windows Phone's Metro aka Mordern UI. As said, it's only showing the home screen as the photo shows a shortcut to the menu, and it's not clear which kind of home screen widgets we are seeing here.
For HTC it would makes perfect sense to reuse the HTC Sense user interface on a non-Android smartphone since the UI is the only emotional selling proposition and touch point, OEMs have today and it will be interesting to see and hear what HTC is using as the underlying system. Nevertheless, I still think that it could be easier for HTC - and maybe cheaper - to use Sailfish OS as an alternative.
Cheers ~ Arne