China would very much prefer that Taiwan ask to reunite with the mainland. Forcing them back one day might be in the cards but setting the conditions to where Taiwan sees being part of China as being the better option than relying on the United States for its safety is what China would like to happen. Finding ways to drive wedges between the US and Taiwan is a part of this strategy.
If that is the strategy, then it is failing.
Taiwan is more anti-unification than it has ever been, and the people there already consider themselves to be an independent country.