홍강, or the Red River, is a major river in northern Vietnam. It flows through the capital city, Hanoi, and is known for its rich history and cultural significance. The river originates in China and travels approximately 1,149 kilometers before emptying into the Gulf of Tonkin. The 홍강 basin is vital for agriculture, supporting rice cultivation and fishing. Its fertile plains have been home to various civilizations for centuries. The river also plays a crucial role in transportation and trade, connecting different regions and contributing to the local economy.