On the novelty of patent

As far as I know, the judgment of patent novelty in the United States is global, that is to say, it is absolutely novel now. Therefore, after China applied for a patent, someone who applied for the same patent in the United States lost its novelty and should not be able to apply for a patent. Of course, I can use the priority to apply for a patent in PCT member countries including the United States within 12 months, provided that the priority is met.