Thanks to Vladimir Burnin in Comments for pointing it out. It’s listed at the Chinese Teclast site.
They’re not calling it the Teclast X98 Air II With Windows, but it uses the same Intel Z3736F as the Air II, with a peak frequency of 2.16GHz.
This is the first 9.7-inch tablet Teclast has produced with Windows 8.1 pre-installed. Prior tablets were Android-based and required an onerous firmware download and installation.
IMP3Net has some press material [Google Translate].
The official Tmall page (sales begin on the 15th).
My head is beginning to spin trying to keep straight all of the Teclast tablets.