By all accounts, the Chinese have so far done a good job of containing the spread inside their borders (outside of Wuhan). But I feel there's a significant lesson to be learned from how the virus exited Wuhan in the first place: containment measures applied too late, after the scale of the problem became too obvious to ignore. I fully expect this response to be the norm, across all scales from community to city to nation.
I think that China and other large (in terms of area) countries like the US will come out of this "OK", modulo the economic impact. For the most part, intranational travel is funneled through long-distance rail and air routes, which are relatively easy to monitor and control. I have more concern for e.g., Western Europe, where there is not a significant geographic separation between the major population centers, and where there is a strong expectation of free & untracked movement.