[RamsFanSam]

This is certainly a tougher choice than most. Considering the current pseudo-dictatorship in Washington (which, I believe, is taking us toward a more fascist-oriented state), US intervention would be most unwise, and would most likely result in a nuclear war.
Perhaps the best way to approach this would be with a neutral party. (i.e., a negotiator.) If the right person could be found, they might persuade talks to begin between the two countries. From my knowledge of the Taiwan-China situation, (which I admit is not much), there are several issues that need to be addressed.
1. Taiwan recognizing China's government as a legitimate organization.
2. China admitting the right of Taiwan to exist.
Then, once the above have been done:
3. Discussions as to why the rift between the philosophies of Chiang-Kai-Shek and Mao-Tse-Tung (forgive the 'old school spellings') should still be causing political shock waves 57 years later,
4. Concessions by both countries in some manner, for instance, Taiwan offering trade deals with China in exchange for limited autonomy. Yes, I said limited, as in Taiwan remaining an independent country, but limited to a status such as 'former Imperial Chinese territory'.
5. Setting a timetable to encourage economic and governmental cooperation between the countries.

My experience with Chinese people is limited. I once worked for a lady whose parents left Mainland China in 1949, moving to Taiwan. She, and many of her Chinese friends and family members, were very proud of their history and heritage, held tight to tradition, and believed in the time-honored traditions of proper behavior. If they are representative of the majority of the Chinese, there is indeed much work to be done before any type of reconciliation is possible.