Just my opinion.
1. For a truce, there is still too much hostility emanating from Washington DC. So screw them.
2. Remember that movie The Silence of the Wolves? Or was it The Silence of the Lambs? Forget, but you know what I am talking about. It is what Hanibal Lecture said as Anthony Hopkins was great, teaching that young lesbian Jody Foster, think in first principles, what is the matter in of itself? Words to that effect.
So what is going on here?
This is a ongoing process, these restrictions, this move is for the future.
Therefore, I have to expect the CCP anticipates something coming soon. Since rare earths are used in weapons production, that is a telling sign.
Prof Mearsheimer said that the war in Ukraine will come to an end, but there probably will be no peace, as those Ukrainians will be upset and still attack as domestic terrorist inside the Donbass region. That makes a lot of sense.
Now if people are being this hostile, they could turn on others later on. So I like to think of this as a pre-emptive move.