1. America is still playing the role of the ”Balance of Power” between the Taiwan Straits.2. At the beginning of 1950, Taiwan was one of those who participated the ”Policy of Containment” to the Communist China initiated by America.3. At the beginning of 1970, Taiwan was the channel to the ”Establishment of Diplomacy” between the Sino-America.4. At the beginning of 1980, Taiwan was the one who afforded the ”Improvement of Diplomacy” between the Sino-America.5. At the beginning of 21th century, the ”Policy of Taiwan” made by China is using America to influence on Taiwan.