Anyway, back to topic. I am wondering if the ZBD2000 could actually with its own power make it across sea to... say... Taiwan?
That would be a hazardous undertaking to say the least.
First of all, does the ZBD2000 carry enough fuel for the distance? The narrowest part of the Taiwan Strait is 131km, and based on the ZBD2000's speed of 45km/h, it will take 3 hours to cross. Sounds simple enough, except that there are other complicating factors.
Even if the ZBD2000 carries enough fuel to cross Taiwan Strait, it will be subjected to the water currents, which will sweep it either Northeasterly, or Southwesterly. Not too big a deal, as these can be compensated for (and the Marines should know this if they are worth their salt). However, it does mean that the actual distance traveled and the time taken will be longer.
There is than the issue of avoiding collision with shipping that uses the Taiwan Strait. A 400,000 Ultra Large Crude Carrier carrying oil to Northeast Asia (including the northern ports of PRC) will not be avoiding these AAVs. Thus, it is up to the AAVs to avoid the huge ships that ply the area, or be run over.
Add to this the sea conditions that the AAV have to cross, that it becomes rather daunting. Not sure how well the AAVs will hold up un Sea State 3 for 3+ hours. The Marines, even if they make it ashore, may be so seasick that they are in no condition to fight.
More importantly, the western side of Taiwan are largely cliffs. AAVs are not designed to climb cliffs. And any guns on top of the cliffs will make short work of AAVs in water. For proper amphibious assault beaches, the eastern seaboard of Taiwan is more suitable. But I doubt the Marines will make the AAVs swim all the way there from PRC's coast.