Eighteen rock art sites dating back over 4,000 years have been discovered by archaeologists in northern China's Inner Mongolia autonomous region. The prehistoric art was discovered in the Yinshan Mountains in Urad Middle Banner (an administration division of the Inner Mongolia Autonomous Region), said Liu Binjie, head of the Cultural Relics Bureau of Urad Middle Banner.

...

Liu said that carvings of faces found on Yinshan Mountains cliffs are similar to those in the Helan Mountains, located on the boundary between Ningxia and Inner Mongolia. They are also similar to those in eastern Russia, showing close connections with ancient peoples' migration patterns, showing similar worship ceremonies.