And it seems that they are attached to no other than Amanda Waller, the head of A.R.G.U.S. (I've got that right, right? ).
I don't think anymore this is Isabel Rochev we saw back in S01Ep22 (though it was the best guess at the time). Amanda Waller has been introduced since and indeed, she fits the profile better imo.
As you said, it's still unclear why Waller would want to destabilize China.
But then we saw Isabel Rochev in ep 2.18 wearing similar red heels (see cap below):
And one has to remember that the connection between Slade and Isabel is still not clear, so ...