well it's been some time since an exascale computer race began I mean apparently withIN China:I think China has basically decided that amid the Trump hostilities, it is no longer willing to divulge the true capabilities of its top systems as that knowledge provides information with which to predict how much China's key industries and military can benefit from them. Indeed, in June, it withheld more than one Shuguang supercomputers that were said to be over 50% more powerful than America's top system. I can't find any more public information on how much they or other new Chinese designs have improved since then but China's continued ascent on the number of TOP500 systems as well as capability of their aggregate performance (even without the big guns) strongly suggests parallel improvements to its elite supercomputers.
Oct 23, 2018
so let's wait and see
(I plotted it already several years ago:
just to show a fascinating progress in supercomputing over the years)