The foehn forces that fled after Blood Rage came in Nobody Home, I think, so I don't think first idea makes that much sense, considering evaccing Yunru is their top priority
Also, Yuri freely using Chronosphere doesn't make much sense. The one they have is an old version that could only transport a few and from how Unthinkable turned out, it also took an explicitly long time. Meanwhile, the only other Chronosphere is the Paradox Engine. There are no other Chronospheres other than the two
Perhaps its an event that is happening simultaneously instead? I am certaij there were a couple cells in China that may or may not have made it qoth the main force and are isolated?