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Mainland china is controlled by the communists whereas taiwan is controlled by
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The Chinese mainland is controlled by the communists but Taiwan is controlled by Taiwan
The Nationalists and Communists were enemies when World War II broke out, but they came together to drive out the Japanese. After the conquest of Japan, the island of Taiwan came under Chinese control, and was again confronted by Communists and Nationalists.
The Communists persuaded many people in rural China to revolt against the Nationalists. This subsequent growth enabled the Communists to push the Nationalists into southern China. By 1949, Mao had established a Communist government in Beijing. Jiang Jieshi then fled to Taiwan with two million Nationalist followers and established his capital in Taipei. The island of Taiwan became part of China that was not under Communist rule.