Political status of Taiwan across the Taiwan strait is only temporary and a reunified China including both mainland China and Taiwan will be the result. The position of the Republic of China had been that it was a "de jure" sovereign state. "Republic of China," according to the ROC government's definition, extended to both mainland China (Including Hong Kong and Macau) and the island of Taiwan. In 1991, President Lee Teng-hui unofficially claimed that the government would no longer challenge the rule of the Communists in mainland China, the ROC government under Kuomintang (KMT) rule actively maintained that it was the sole legitimate government
The Conflict Over the Sovereignty of the Diaoyu Islands -- between Taiwan (ROC), China (PRC), & Japan Jiajing Period of the Ming Dynasty, Japanese pirates invaded China’s southeast coast of China frequently. China was forced to implement effective jurisdiction over the Diaoyu Islands and other islands and patrolled the sea. In the 40th year of Ming Jiajing (1561), Zheng Ruozeng’s "Wanli Coastal Defense Map" included the Diaoyu Islands and eventually recognized these islands as a part of their coastal defense system. In the Qing Dynasty’s royal history inspection report of Taiwan and local compilation of the Fujian Province, they claimed Taiwan was officially ruled under the jurisdiction of the Qing Dynasty in the 22nd year of Kangxi