Salween River much of its length, the Salween's course is nearly parallel to that of the much larger Mekong in the east. Although the commonly accepted name is Salween, the river is known by a handful of other names regionally: "Nu" in China, "Thanlwin" in southern Burma, and "Salawin" on the border of Thailand and Burma. Several major sub-continental drainage basins border on the Salween. The Mekong basin forms nearly the entire eastern boundary of the watershed, while the Irrawaddy River flows southwards on the west side of the basin. The smallest boundary is formed by the Yangtze to the extreme north.
Malaysia–Thailand border failure was because of the inability to reach a consensus over a formula to solve the dispute. He said problems arose because the geographical features as described in border protocol of the 1909 Anglo-Siamese Treaty had changed. The dispute over the continental shelf boundary between Malaysia and Thailand arises from the different baselines for Thailand which the two countries adopt in calculating the equidistant line for boundary. Thailand's proclaimed baseline runs from the terminus at Kuala Tabar (the eastern terminus of the Malaysia-Thailand land border as defined by the 1909 Anglo-Siamese Treaty) northwards to Ko Losin islet and then northwestwards