The Yangtze ( or ), which is 6,380 km (3,964 mi) long, is the longest river in Asia and the third-longest in the world. The river is the longest in the world to flow entirely within one country. It drains one-fifth of the land area of the People's Republic of China (PRC) and its river basin is home to nearly one-third of the country's population. The Yangtze is the sixth-largest river by discharge volume in the world.