장강, also known as the Yangtze River, is the longest river in China and the third longest in the world. It stretches approximately 6,300 kilometers (3,917 miles) from its source in the Tibetan Plateau to its mouth at the East China Sea. The river plays a crucial role in the country's economy, providing water for agriculture, transportation, and hydroelectric power. The Yangtze River basin is home to diverse ecosystems and numerous cities, including Chongqing and Shanghai. It is also significant for its cultural heritage, with many historical sites along its banks. The river supports a variety of wildlife, including the endangered Yangtze giant softshell turtle.