What

 

if they just surround (Blockade) it and cut it off?

Taiwan invasion by China would fail, but at huge US cost, analysts’ war game finds

Not a land based invasion as was war gamed 24 different ways, then what?

"The wargaming tested 24 different scenarios focused on China attempting to seize the island by invasion in 2026. Crucial was the United States: without America’s help, Taiwan would be conquered by the People’s Liberation Army in three months or less."

(Their (China's) best chances are before fall or later this year and they know it, assuming 2026 allows us to put assets in place we dont have there yet.)