If China had close allies that close to the US, then in international waters they would have every right to conduct such exerices, despite what the US might bellyache about.
Of course, it follows that the same is true vice versa.
I suppose the difference is about whether something within ones legal rights can still be considered... "morally" right.
Personally, I think the world should be inherently multipolar, with power more evenly divided. That means each big player gets their own backyard, and that means even if China were somehow ever in a position to dominate the Americas in the same way as the US dominates Asia today, I think China shouldn't.
Understood...and Xia is young. However, it will only help to learn early on to use examples that actually fit the scenario you are describing. Very important in any dialog/discussion/debate skills.
But...that's just my own opinion.
Yeah, I think the analogy was a bit tenuous as well.