Very interesting reading.
https://digital-commons.usnwc.edu/cg...cmsi-red-books
One passage stands out:
The existing amphibious fleet apparently is considered sufficient for China’s deterrence requirements. It is too small for a major campaign across the Taiwan Strait unless augmented by large numbers of civilian ships and other craft. The distribution of the force along the entire coast minimizes the chance for strategic surprise, as units would have to be assembled from all over the country to prepare for a large-scale amphibious operation. Chinese shipyards could surge amphibious craft production, but that too would be discovered easily.
I'd just assumed that at a moment's notice, they'd be able to flood marines and troops across the Strait and crush Taiwan.
Not so it would seem.