Again, one has to go back to the great LKY to understand the Chinese promised dream of unifying Taiwan. LKY states that it was clear in the Tehran conference of 1943 when Kuomintang supreme Chiang Kai Shek had shown his intent to eventually take back Formosa into China in the post war era firmly enshrining China and Taiwan's shared destiny under the Republic of China. However, it was the difference in the political thought and the Cold War dynamics which led to the present resentment in Taiwan and with the US against Chinese overtures.
China is destined and will eventually unify Taiwan with it. The time period can't be stated as China does not seem to be in mood for an aggressive operation. China Taiwan have a thriving trade relation and people movement which still connects them culturally. As long as Taiwan has the principle of no-independence (alongside no-reunification, no-surrender) it can be rest assured that China will stay put. If tomorrow a regime comes and declared independence, then it be said definitely that the status quo will change and China will be compelled to take forceful action. This leads to the second point, that will China be ready to take a forceful action against 95 % Han populated state, its own. In the past it quelled rebellion in Han mainland and used action on Han people as well, but a heavy military action in Taiwan with a modern - developed - world class modern outlook society which is interlinked with the world in material and culture may not bode well with Han majority in Mainland China. In this scenario even if US will come into action, it has to adopt kinetic force without any land-based operation. And here again it will be thrust against Chinese warfare prowess. And this is where LKY states that even if China has setbacks in initial wave of attacks from US, it will respond harder in the subsequent waves and will be more resolute in taking Taiwan by full force even with a hard land-based action.
So, it's a long wait for China which it will be willing to sit out!
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