Mwaa, the guy is on war with some 60+% of his own countries' population, putting the whole country on fire, ehhh, civil war. And the guy is even on war with about the whole world.
And now, raising his "promised" walls -after the physical one failed 100%- by raising traffic restrictions.
In the meantime, the Covid-19 virus spread in the USA is not getting lower and due to lessening the contact restrictions will fuel up a second wave of Covid-19 infections. So, I certainly can understand China (and the rest of the world), do not want to see infected US people arrive.
Looks to me, this is going to end in a huge disaster for the US population.
Same, same with other countries, where populist Bokitos managed to become head of state (Brazil, UK, Russia, to name a few).