China isn’t looking to obliterate Taiwan off the earth. They wage a war to unite the country: they need a functioning Taiwan as much as possible after the war ends.
To put it another way, they considers it to be a civil war, and will give plenty of warning in order to convince everyone else to stay out of the way.
To put it another way, they considers it to be a civil war, and will give plenty of warning in order to convince everyone else to stay out of the way.