About China
China is a cultural region, an ancient civilization, and, depending on perspective, a national or multinational entity extending over a large area in East Asia.

China has one of the world's oldest people and continuous civilizations, consisting of states and cultures dating back more than six millennia. It has the world's longest continuously used written language system, and is the source of many major inventions, such as what the British scholar and biochemist Joseph Needham called the "four great inventions of Ancient China": paper, the compass, gunpowder, and printing. Historically, China's cultural sphere has extended across East Asia as a whole, with Chinese religion, customs, and writing systems being adopted to varying degrees by neighbors such as Japan, Korea and Vietnam.

The last Chinese Civil War has resulted in two political entities using the name China:

the People's Republic of China (PRC), commonly known as China, has control over mainland China, and the largely self-governing territories of Hong Kong (since 1997) and Macau (since 1999).
the Republic of China (ROC), commonly known as Taiwan, has control over the islands of Taiwan, Pescadores, Kinmen, and Matsu.

People's Republic of China and Republic of China (1949–present)
After its victory in the Chinese Civil War, the Communist Party of China (CCP) led by Mao Zedong gained control of most of Mainland China. On 1 October 1949, they established the People's Republic of China as a Socialist State headed by a "Democratic Dictatorship" with the CCP as the only legal political party, thus, laying claim as the successor state of the ROC. The central government of the Chinese Nationalist Party led by Chiang Kai-shek was forced to retreat to the island of Taiwan that it had occupied at the end of World War II and moved the ROC government there. Major armed hostilities ceased in 1950 but no peace treaty has been signed.

Beginning in the late 1970s, the Republic of China began the implementation of full, multi-party, representative democracy in the territories still under its control (Taiwan, and a number of smaller islands including Quemoy and Matsu). Today, the ROC has active political participation by all sectors of society. The main cleavage in ROC politics is the issue of eventual political unification with the Chinese mainland vs. formal independence of Taiwan.

After the Chinese Civil War, mainland China underwent a series of disruptive socioeconomic movements starting in the late 1950s with the Great Leap Forward and continuing in the 1960s with the Cultural Revolution that left much of its education system and economy in shambles. With the death of its first generation Communist Party leaders such as Mao Zedong and Zhou Enlai, the PRC began implementing a series of political and economic reforms advocated by Deng Xiaoping that eventually formed the foundation for mainland China's rapid economic development starting in the 1990s.

Post-1978 reforms on the mainland have led to some relaxation of control over many areas of society. However, the PRC government still has almost absolute control over politics, and it continually seeks to eradicate what it perceives as threats to the social, political and economic stability of the country. Examples include the fight against terrorism, jailing of political opponents and journalists, custody regulation of the press, regulation of religion, and suppression of independence/secessionist movements. In 1989, the student protests at Tiananmen Square were violently put to an end by the Chinese military after 15 days of martial law. In 1997, Hong Kong was returned to the PRC by the United Kingdom, and in 1999, Macau was returned by Portugal.

Today, 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 resolution 2758, the representatives of Chiang Kai-shek to the United Nations were expelled from the intergovernmental organization. With the expulsion of the Chiang Kai-shek's 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 all of China, nor has it changed its official maps, which includes the mainland and Mongolia. Following the introduction to 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 following the electoral victory of the KMT's Ma Ying-jeou as president, the claim to mainland China has been reinstated.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. Over the last 50 years, both the Republic of China and the People's Republic of China have used diplomatic and economic means to compete for recognition in the international arena. Because most international, intergovernmental organizations observe the One-China policy of the People's Republic of China, the PRC has been able to pressure organizations, such as the World Health Organization and the International Olympic Committee, to refuse to officially recognize the Republic of China. Due to the One-China policy, states around the world are pressured to refuse, or to cut off, diplomatic relations with the Republic of China. As a result, only 23 U.N. member states currently maintain official diplomatic relations with the Republic of China, while the vast majority of U.N. member states maintain official diplomatic relations with the People's Republic of China.

Geography and climate
China ranges from mostly plateaus and mountains in the west to lower lands in the east. Principal rivers flow from west to east, including the Yangtze (central), the Huang He (Yellow river, north-central), and the Amur (northeast), and sometimes toward the south (including the Pearl River, Mekong River, and Brahmaputra), with most Chinese rivers emptying into the Pacific Ocean.

In the east, along the shores of the Yellow Sea and the East China Sea there are extensive and densely populated alluvial plains. On the edges of the Inner Mongolian plateau in the north, grasslands can be seen. Southern China is dominated by hills and low mountain ranges. In the central-east are the deltas of China's two major rivers, the Huang He and Yangtze River. Most of China's arable lands lie along these rivers, and they were the centers of China's major ancient civilizations. Other major rivers include the Pearl River, Mekong, Brahmaputra and Amur. Yunnan Province is considered a part of the Greater Mekong Subregion, which also includes Myanmar, Laos, Thailand, Cambodia, and Vietnam.
In the west, the north has a great alluvial plain, and the south has a vast calcareous tableland traversed by hill ranges of moderate elevation, and the Himalayas, containing Earth's highest point, Mount Everest. The northwest also has high plateaus with more arid desert landscapes such as the Takla-Makan and the Gobi Desert, which has been expanding. During many dynasties, the southwestern border of China has been the high mountains and deep valleys of Yunnan, which separate modern China from Burma, Laos and Vietnam.

The Paleozoic formations of China, excepting only the upper part of the Carboniferous system, are marine, while the Mesozoic and Tertiary deposits are estuarine and freshwater, or else of terrestrial origin. Groups of volcanic cones occur in the Great Plain of north China. In the Liaodong and Shandong Peninsulas, there are basaltic plateaus.

The climate of China varies greatly. The northern zone (containing Beijing) has summer daytime temperatures of more than 30 degrees Celsius and winters of Arctic severity. The central zone (containing Shanghai) has a temperate continental climate with very hot summers and cold winters. The southern zone (containing Guangzhou) has a subtropical climate with very hot summers and mild winters.

Due to a prolonged drought and poor agricultural practices, dust storms have become usual in the spring in China.Dust has blown to southern China and Taiwan, and has reached the West Coast of the United States. Water, erosion, and pollution control have become important issues in China's relations with other countries.

Culture
Confucianism was the official philosophy throughout most of Imperial China's history, and mastery of Confucian texts was the primary criterion for entry into the imperial bureaucracy. China's traditional values were derived from various versions of Confucianism. A number of more authoritarian strains of thought have also been influential, such as Legalism. There was often conflict between the philosophies, e.g. the Song Dynasty Neo-Confucians believed Legalism departed from the original spirit of Confucianism. Examinations and a culture of merit remain greatly valued in China today. In recent years, a number of New Confucians (not to be confused with Neo-Confucianism) have advocated that democratic ideals and human rights are quite compatible with traditional Confucian "Asian values".

With the rise of Western economic and military power beginning in the mid-19th century, non-Chinese systems of social and political organization gained adherents in China. Some of these would-be reformers totally rejected China's cultural legacy, while others sought to combine the strengths of Chinese and Western cultures. In essence, the history of 20th-century China is one of experimentation with new systems of social, political, and economic organization that would allow for the reintegration of the nation in the wake of dynastic collapse.