 These headwaters () are a tributary of the Markog (), one of the two main upper stems of the Dadu along with the Darkog ().Traditionally, the source of the Dadu was considered to be in the Golog Mountains in Jigzhi County at the head of the Markog, but this source was found to be a few metres shorter than the true source.Similarly, the source of the Darkog in southern Darlag County is a mere shorter than the Ma'er Qu source.