Theres however absolutely no reason China would rush in with troops first. That would be committing a mistake even a 3rd rate power like Israel knows to avoid. Even if KMT restarts the civil war with a horrible terror attack on par with 9/11, CPC is way above being baited by emotions into sending in troops unsupported.what biscuits says actually makes sense. Taiwan's defense strategy also seems to be gravitating towards the same approach, which is to destroy PLA's landing capabilities and prevent once and for all landing of ground forces. the logic here is that regardless of what the PLA can do in the air and on the sea, without amphibious ships it cannot land on Taiwan. this will give the US time to deploy its forces and break down PLA's blockade from the outside.
the solution to this, aside from building more ships and bolstering air defense, also includes attacking Penghu and Matsu early on. because it will force the Taiwan coastal defense forces to choose to either engage PLA ships and risk exposing fire positions, or let PLA have those islands easily.
Instead, a restarted civil war is likely to start with China ordering its civilians inside Taiwan to evacuate into safe zones, followed by bombing everything that isn't a safe zone. Once the cohesion/command of Taiwanese rebels have been broken, a relatively small landing party can hold port cities, paving way for a much larger army force that will clear isolated resistence fighters, including out of tunnels and trenches, if such structures have been prepared.
Since the army and bomber forces will be able to shoulder almost all of the counter insurgency at home, the navy and air force's fighters are more or less not needed and can focus entirely on defending/deterring against a potential US invasion.
China should be able to launch over 1 million munitions in 1 week. It is not even estimated there are 1 million total anti-government fighters on Taiwan, but for additional safety, the preparative air campaign would likely last 2-4 weeks. 2-4 weeks is a critical point, because at that time, many supplies start to go bad without electricity, rebel fighters will start to lack clean water and food.
If US is serious about taking over Taiwan, they must achieve a decisive victory in just the span of these 2-4 weeks, and at the same time convince most Chinese that the province isn't worth fighting for.