Because they’d been propping up Taiwan and China’s neighbors until just a few months ago, why would they let such a huge investment go down the drain? Unless they recalculated and don’t plan to attack China anymore, which, being the US, I’m reluctant to believe but I could see it if it’s to go for smaller fish. After all, China wouldn’t be going anywhere (geopolitically) even if the US military threw every last thing it had at it.