What makes you say there is absolutely zero chance the US can win in a war over Taiwan? What makes you so confident in that and you are aware the US has hundreds of bases near China with 120 in Japan and 9 in the Philippines, those are imporant bases,
The fact that Taiwan is 100 miles off the coast of China and the existence of the PLAAF and PLAN as well as myriad of hypersonic and ballistic anti-ship missile systems. Is the chance of victory 100%? No of course not, but it's probably somewhere between 95%-99%.
Also, I am very aware of what major U.S. positions are around China. It's not hundreds of bases, because for the purpose of this conflict, only airbases and naval bases are important. Nobody cares about the small FOBs and various other facilities that count as "bases".
and yes I would say it would be possible for China to beat the US and keep influence in Cuba if China had hundreds of bases near the US.
This is exactly why I say people here seem to be underestimating the US by saying there is zero possibility the US could win in a war over Taiwan
Even IF China had an airbase in Cuba and naval port, it wouldn't matter. STOP LOOKING AT NUMBERS and start looking at logistics. HOW will those bases be resupplied and reinforced? How vulnerable are they to attack? Are they able to provide enough protection to the assets they contain to allow them to sortie and participate in meaningful offensive actions?