Xilamulun River

The Xilamulun River ( _mn. Shar Mörön, "Yellow River", also romanized as Xar Moron [the X is used roughly like in Hanyu Pinyin here, i.e. to present an "sh"-like sound. The cyrillic spelling, as used in Outer Mongolia, would be Шар Мөрөн. Outer Mongolians, however, nowadays usually use the name "Shar Mörön" to refer to the larger Yellow River.] ; Chinese: , , or ) is a river in Inner Mongolia, in northeast China. It flows through the grasslands of that region, forming a valley that is hospitable to both farming and herding. The valley was once home to the Khitan people.

The Xilamulun River is the source of the Xiliao River (西辽河), which in turn is one of the headwaters of the Liao River.

The musical instrument "xiqin" (), the ancestor of China's "huqin" family of bowed string instruments, is believed to have originated here with the Khitans, who were formerly called Xi () by the Chinese.