evidence: Eastern China [edit]- Northeast Plain Northeast of Shanhaiguan a narrow sliver of flat coastal land opens up into the vast Northeast China Plain. The plains extend north to the crown of the "Chinese rooster", near where the Greater and Lesser Hinggan ranges converge. The Changbai Mountains to the east divide China from the Korean peninsula. [...] Territory and boundary disputes [edit]The territory of China has been defined as a homeland for many different ethnic and racial groups in the country. However, the way that the territory has been defined varies between ethnic groups. In relation to the Han Chinese, the homeland has been defined by national borders which are more or less accepted internationally. This is because the Han Chinese are the largest population and have most influence politically than any other ethnic population in China. To the Han Chinese population, the territory of the country is defined by the regions of Tibet, inner Mongolia, Manchuria, and the Xinjiang Province which is the most western land of China. The Chinese territory is the second largest in land area and also has the longest combined land border in the world. However, there are many other ethnic groups in China that have their own definitions of what concerns the territory of China.