If what you write is true (and I have no reason to doubt it as you seem well-informed), this would be a very effective deterrent to war altogether. China is probably flexing her muscles for the same reason most revolutionary regimes flex their muscles- to paper over internal problems and divisions by focusing on a foreign adversary.
Where I agree with a lot of what he says...
What he is missing discussing is that China, like Russia is an oligarchy type communist government.
Meaning that where they might seem to be unified there's a LOT of dissention between the various regions. Also the absolute silence of any real news/information about the outside world is also extremely fertile ground to sew more dissention between the oligarchs.
Most of these oligarchs are also usually very corrupt...they have just finished having a couple "disappeared" lately with bank accounts confiscated....rumors has it that they were only the tip of the iceberg of corruption but that they couple were in positions that actually could be chastised for their actions...the rest currently are untouchable due to all the fallout from properly dealing with them and there would be no more honest replacement for these people either.
Some of these oligarchs and military Generals are extremely hawkish...and currently they are occupied with the Indian border. India would have no compunction about starting an all out war if they felt they had backing of the entire world. (China has stolen some of their territory)
Hong Kong province wouldn't be all that amused if the PRC was attacked but if China continues to oppress them... probably wouldn't mind either...so long as they were left out of it.
Shanghai is of course the capital province. But there are severe divisions within. The smoke in the spring and fall from buckets of coal they burn because the central heat has been turned off clouds the street so bad they can't see across it. Everyone walks outside with masks on a normal basis... pandemic started nothing new for them.
Also the Christian persecution of late has been extreme...when and if they figure out that their Government is at war with America...it's not going to go well.
There are issues with all of the provinces from the prices for housing to their new "multiple child" policy.
Nationalism has degraded into provincial pride.
So yes, China is saber rattling...and it might actually accidentally or intentionally break out into actual warfare.
What we can do is to help India with vaccines and healthcare for everyone...which will also greatly curb variants for the pandemic. (Myanmar/Burma is, and will continue to be a lost cause)
Pakistan is susceptible to bribery as always.
And Russia has no love lost for China as well.
Japan, would love to raise an army/navy once again... Vietnam wants revenge....Aussies and New Zealand can be convinced...and the EU needs to cough up troops and money. (It's their investments too)