The parts under US occupation?
What is the meaning of “part”?
Back in the Cold War, for a while there even Konrad Adenauer said West Germany was a client state of the US.
Is Guam a part of the United States? I’m guessing you would say yes.
Was it a part of the United States the day the US Navy imposed a military governor on this conquered territory in 1898?
These are all complicated, fuzzy concepts.
“These are all complicated, fuzzy concepts.”
Except when it becomes something your beloved Chinese Communist Party claims.
Then it’s clear as a bell to you.