This article gives some clues as to what a limited offensive move by China might look like:

https://www.taipeitimes.com/News/front/archives/2020/09/01/2003742623

"If Beijing were to wage a war now, its combat plans could take the form of military intimidation, blockades, firepower strikes and landing operations, the report said.

It could cut off Taiwan’s supplies and demand surrender by blocking Taiwan’s major ports and maritime transportation, it said.

The PLA could also launch missiles that target Taiwan’s command systems, locations of great economic and political importance, or symbolic objects, as part of efforts to gradually disintegrate Taiwanese morale, it said.

Forceful occupation of Taiwan’s outlying islands by the PLA might take place during this stage, it added.

If the PLA had achieved air supremacy, command of the sea and electromagnetic spectrum dominance, and had wrecked most of Taiwan’s armed forces, its next move would likely be to send sea, air, land and rocket teams to conduct a series of attacks, such as decapitation strikes, raiding Penghu and ultimately invading Taiwan, it said."