Except for a very important one. Taiwan is not internationally recognized as an independent country by almost all nation-states. And those few that recognize Taiwan (or rather ROC) as a country do not recognize PRC as a country.

You may say that ROC is a de facto separate country, although the constitution doesn't imply necessarily so, but simply that there's a different government.

The fact that the international community and even it's own constitution doesn't recognize it as an independent country shows that it's more than legal fiction and simply that de facto China is still under civil war.

The Malacca Straits not being that wide, would make it easier for China's carrier killer missiles to destroy them.

Huawei at least is giving their source code to be scrutinized. What can be said of other vendors?

Is the per capita still rising rapidly? China's CO2 growth levels have already started leveling off, and actually showed a slight decline as of late.

https://www.carbonbrief.org/analysis-clean-energy-just-put-c...

But commercial jet liners aren't as important to China for security. They have high speed railroads for that.