I just want to pull out this obvious incongruence/lie from your quote. If China really intends to unify peacefully with Taiwan, why are they so concerned with Taiwan buying arms? If they truly want a peaceful unification, why would the arms sale hamper the process? The answer is that China wants to unify, be it peaceful or not. The only thing stopping it from it not being peaceful is the benefits of a forced take-over aren't big enough to overcome the detriments. It's a calculated decision.