More than 75% of the precious cultural relics on the ground.
More than 30% of cave relics.
Underground cultural relics 10% or more.
Most of them are in museums in Britain, France, Russia, the United States and other countries.
Cultural relics are relics and remains with historical, artistic and scientific value left by human beings in social activities. It is a precious historical and cultural heritage of mankind.
Cultural relics refer to specific material remains, whose basic characteristics are: first, they must be created by human beings or related to human activities; Second, it must be an irreversible past.