Earlier quoted context omitted.
Why do you say China is unstable? The US is talking about starting a war, had government shutdown issues recently, and has a president that is abrasive on foreign affairs. UK is dealing with brexit. China may have the issue with HK recently, but to an outsider, they look more stable. Of course, something like Japan or Australia seems better, but China isn't a terrible choice.
> Why do you say China is unstable? It's now a dictatorship, with a single man ruling for life. The history of dictatorships shows, for fundamental reasons, stability in the short term and chaos in the medium. (The fundamental reasons include not being able to back away from bad decisions, eliminating competent rivals, and as a result bumbling into crises that seem to escalate themselves.)
Even the US was very undemocratic for most of its history (remember when only white male landowners could vote?), and that didn’t stop its ascendancy to world superpower.