주강, also known as the Yangtze River, is the longest river in China and the third longest in the world. It flows for about 6,300 kilometers, starting from the Tibetan Plateau and emptying into the East China Sea. The river plays a crucial role in the country's economy, providing water for agriculture, transportation, and hydroelectric power generation. The Yangtze River basin is home to diverse ecosystems and numerous cities, including Shanghai and Chongqing. It is also significant in Chinese culture and history, often referred to in literature and art. The river supports a variety of wildlife, including the endangered Yangtze giant softshell turtle.