The Heilong River, also known as the Amur River, is one of the longest rivers in Asia, stretching approximately 2,824 kilometers. It forms part of the border between China and Russia, flowing from the Baikal Mountains in Mongolia to the Sea of Okhotsk. The river is significant for its diverse ecosystems and serves as a vital water source for the surrounding regions. The Heilong River basin supports various wildlife and is home to several endangered species, including the Amur leopard and Siberian tiger. The river also plays a crucial role in the local economy, providing opportunities for fishing, agriculture, and transportation.