North Korea's Changbai Mountain is located in a part of the border between China and North Korea.

The whole Changbai Mountain system includes Changbai Mountain in China and Gaima Plateau in South Korea. The Yalu River and Tumen River in the middle of the mountain divide Changbai Mountain into two parts, which belong to China and Korea respectively. National boundaries were formed in history and delineated as early as the early Ming Dynasty. After the founding of People's Republic of China (PRC), the Tianchi area of Baitou Mountain was redefined, and more than half of Tianchi, which originally belonged to China, was given to North Korea, because in the history of North Korea, Tianchi was the birthplace of the Korean nation, where the great leader Kim Il Sung fought, and Kim Jong Il was born in the nearby revolutionary camp. In addition, after the founding of the People's Republic of China, most of the islands of the Yalu River were allocated to North Korea, which was the most serious for Dandong and others.