The landscape of the biological world more than 200 million years ago is shown in the hall of Ancient Reptiles. The crossopterygians, Ichthyostega, gymnophionan amphibians and Dimetrodon are selected as representatives to demonstrate the complexity of vertebrate development transitioning from water to land. In the center of the hall displayed lifelike dinosaur skeletons including Lufengosaurus huenei known as the first dinosaur discovered by a Chinese scientist, the 26-meter-long Mamenchisaurus jingyanensis, and the Tuojiangosaurus multispinus with sword-like back plates, the majestic Yangchuanosaurus, the soaring pterosaurs, and the ichthyosaurs that dominated the ocean.
Prehistoric Mammals occupies a display area of 480 square meters. After renovation, the fossils on display have increased to include most of the representative prehistoric mammals. The first part of the exhibition shows the evolution of Mesozoic mammals, the second part sheds light on the development and prosperity of the Cenozoic mammals, the third part focuses on Quaternary mammals, and the last part displays the evolution of primates, highlighting the specimens of Pliopithecus zhanxiangi. Featured specimens include Juramaia sinensis, Vilevolodon, Bemalambda, Machairodus, Dinocrocuta gigantean, Hipparion, Stegodon zdanskyi, woolly mammoth, Paraceratherium and Hezhengia.