Yalu River

The Yalu River, also called the Amnok River, is a river on the border between North Korea and China. Together with the Tumen River to its east, and a small portion of Paektu Mountain, the Yalu forms the border between North Korea and China and is notable as a site involved in military conflicts in the First Sino-Japanese War, the Russo-Japanese War, World War II, and the Korean War.

Yalu River in The Hot War
The Yalu River served as the boundary between the People's Republic of China and the Democratic People's Republic of Korea.