Pregnant sand becomes pearls·Bengbu historical and cultural exhibition introduction: Bengbu has a long history. Thirty thousand years ago, traces of human activities in the Huaihe River Basin first appeared at the Xiyou site; seven thousand years ago, the symbols carved on the double piers showed The embryonic state of Chinese writing; 5,000 years ago, the Gaixia Dawenkou Cultural City Site filled the gap in the inheritance of civilization in the Huaihe River Basin; 4,000 years ago, Yu convened the princes in Tushan, kicking off the establishment of the Xia Dynasty; 2,660 years ago A hundred years ago, the tomb of Zhongli Junbai unveiled the mysterious ancient country of Zhongli; two thousand years ago, the ancient battlefield of Gaixia suddenly became the cornerstone of the powerful Han Dynasty; six hundred years ago, Tang Herong, the founder of the Ming Dynasty, returned to his hometown. Cao Shan was buried; during the Ming and Qing Dynasties, Bengbu society gradually took shape. In the second year of Tongzhi, three county divisions were established, and Bengbu took shape and was ready to go.