The Charding Nullah, traditionally known as the Lhari stream and called Demchok River by China, is a small river that originates near the Charding La pass that is also on the border between the two countries and flows northeast to join the Indus River near a peak called "Demchok Karpo" or "Lhari Karpo". There are villages on both sides of the mouth of the river called by the same name "Demchok", which is presumed to have been a single village originally, and has gotten split into two due to geopolitical reasons. The river serves as the de facto border between China and India in the southern part of the Demchok sector.