Yes on all counts!!
Yes China will be dominating economic power in the world very soon.
It is more doubtful that they will be interested in being the dominant military power though. It cost too much and bring a lot of responsibility with it. There is no incentive for that, as long as they are able to defend themselves from aggression.
Yes they control the South China Sea and will continue to do so for as long as it takes to ensure that there are no longer a threat to their sea lanes.
Taiwan will eventually be reunited with the Motherland. Whether that will be by force or by mutual agreement is left to be seen though. As long as nobody stir the pot, status quo and a slow approach to unification is the most likely scenario.
Yes, domination of S.E.Asia is a given, but not in a military way. The ASEAN countries will see that their destiny is tied to a rising China, not to a declining power on the other side of the world.
(US and Europe)
I have no idea if China has any interest in planting “backdoors” into software in equipment it sells to USA or anywhere else, or if they have done so.
If so, I wouldn’t be surprised that CIA/NSA … have managed to place “backdoors” into software sold worldwide, such as Windows, Android, (you name it), or the widely used Facebook, Twitter, Skype etc.
I’m equally worried about both.