Origin: The Issue of Chinese Representation in Making Peace with Japan.- Attack and Defense: Cross-Strait “Diplomatic Battle” and “Truce” around the Issue of Taiwan’s Participation in the International Space.- Base: Alignment of Cross-Strait Political Relations.- Change: Means of Existence of the Taiwan Region in the International Space.- Political Gamesmanship: Taiwan’s Strategies for Participating in International Organizations and the Mainland’s Response.- Coordination: Problems with the Co-Existence of Both Sides in the Same International Organizations, and Potential Solutions.- Future: Construction of a Mechanism for Taiwan’s Orderly Participation in the International Space.