evidence: Taiwan, officially known as the Republic of China (ROC), is an island separated from China by the Taiwan Strait. It has been governed independently of mainland China, officially the People’s Republic of China (PRC), since 1949. The PRC views the island as a renegade province and vows to eventually "unify" Taiwan with the mainland. In Taiwan, which has its own democratically elected government and is home to 23 million people, political leaders have differing views on the island’s status and relations with the mainland. Cross-strait tensions have escalated since the election of Taiwanese President Tsai Ing-wen in 2016. Tsai has refused to accept a formula that her predecessor, Ma Ying-jeou, endorsed to allow for increased cross-strait ties. Meanwhile, Beijing has taken increasingly aggressive actions, including by flying fighter jets near the island. Some analysts fear a Chinese attack on Taiwan has the potential to draw the United States into a war with China. Is Taiwan part of China? Beijing asserts that there is only "one China" and that Taiwan is part of it. It views the PRC as the only legitimate government of China, an approach it calls the One-China principle, and seeks Taiwan’s eventual "unification" with the mainland.