On the 8th, the "'Convergence of Civilizations, Guangyao River Prefecture' - Prehistoric Culture Linxia Forum" opened in Linxia Hui Autonomous Prefecture, Gansu Province. Located in the upper reaches of the Yellow River, Linxia is one of the most concentrated prehistoric cultures in China.

There are Bingling stone forest Danxia landforms 1 million to 2 million years ago, marine life fossils from 1million to 44 million years old.