Zhangjiajie National Park, Ulinyuanya Peak, Dayong Town, Mt. Kunlun, Village Of Yellow Lion, China

Since 1949, mainland China is administered by the People's Republic of China—a one-party state under the leadership of the Chinese Communist Party—while the island of Taiwan and surrounding islands are administered by the Republic of China—a democratic multi-party state. After the founding of the People's Republic in 1949, both states claimed to be the sole legitimate ruler of all of China. After the Kuomintang retreat to Taiwan in 1949, the Republic of China had maintained official diplomatic relations with most states around the world, but by the 1970s, a shift had occurred in international diplomatic circles and the People's Republic of China gained the upper hand in international diplomatic relations and recognition count.
In 1971, under UN resolution 2758, the representatives of Chiang Kai-shek to the United Nations were expelled from the intergovernmental organization. With the expulsion of the representatives, and effectively the Republic of China, the representatives of the People's Republic of China were invited to assume China's seat on the UN Security Council, the UN General Assembly and other United Nations councils and agencies. Later attempts by the Republic of China to rejoin the UN have either been blocked by the People's Republic of China, which has veto power on the UN Security Council, or rejected by the United Nations Secretariat or a United Nations General Assembly committee responsible for the General Assembly's agenda.
Since the relocation of its capital to Taiwan, the Republic of China has not formally renounced its claim to authority over all of China, nor has it changed its official maps, which include the mainland and Mongolia. Following the introduction of full democracy, and the electoral victory of the DPP's Chen Shui-bian in the presidential elections, the ROC had adopted a policy of separating the state's identity from "China", while moving towards identifying the state as "Taiwan".
However, the ROC has not made any formal moves to change the name, flag, or national anthem of the state to reflect a Taiwanese identity due to the lack of consensus within Taiwan, pressure from the United States and the fear of invasion or military action from the People's Republic of China against the island. The Republic of China during the DPP years did not actively pursue its claims on mainland China or Mongolia. However, after having been elected as president, KMT's Ma Ying-jeou asserted that, constitutionally, mainland China is part of the Republic of China. The People's Republic of China claims to have succeeded the Republic of China as the sole legitimate governing authority of all of China, which, from the official viewpoint of the People's Republic of China, includes the island of Taiwan.