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
Mainland Travel Permit for Taiwan Residents differences, such as a different color scheme. Newer permits are also valid for 5 years. This entry permit serves also as the "de facto" ID card for ROC nationals who are residents of Taiwan in Mainland China. As a result, the permit can be accepted in cases of real estate purchasing, banking, medical treatment, insurance, employment, and more. Due to its usage as an ID card and the increasing instances of Taiwanese's long-time stay and settlement in Mainland China, the Taiwan Affairs Office announced that effective from 24 September 2008, the serial number of Mainland travel permit for Taiwan residents