Flag of the Republic of China sovereign independent country of the Republic of China (ROC) to the island of Taiwan. On the mainland, the communist forces of Mao Zedong established the People's Republic of China and adopted their own national flag. On October 23, 1954, the National Emblem and National Flag of the Republic of China Act () was promulgated by the Legislative Yuan to specify the size, measure, ratio, production, and management of the flag. While public display of the ROC flag is generally frowned upon, and may even lead to arrest in the PRC, Cambodia was the first country to outlaw it officially. In
Taiwan, China rules the Taiwan Area (composed of Taiwan and its nearby minor islands), became known as "Taiwan" after its largest island, (an instance of "pars pro toto"). It stopped active claim of mainland China as part of its territory after constitutional reform in 1991. However, since the 2008 election of Ma Ying-jeou, he again asserted that mainland China is part of Republic of China territory according to its constitution, and, in 2013, he stated that relations between PRC and ROC are not between countries but "regions of the same country". In 1971, the People's Republic of China won the United Nations