Interesting find, but I did not find any other source of this news. Link to "Digitimes" marked as a source is not working, direct search on DigiTimes shows nothing.
FWIW...
Here is the very brief release on the public Digitimes that did not mention the name of the client (Bitmain).
https://www.digitimes.com/news/a20180102VL201.htmlThere is a more detailed article on the paid side of Digitimes that mentioned Bitmain but I cannot link it since it is for paid user only.
Of course, there are no details on what Bitmain plans to do with the 12nm chips though.