Introduction to "Paleo-Mammals": This exhibition hall introduces in detail the evolution of proboscis, perissodactyls, artiodactyls, carnivores, primates and angiosperms as well as the famous Shanwang Biota. . In the exhibition hall, the audience can see the restoration drawings and skeletal specimens of Tetradon, which was the largest mammal on the earth during the same period after the extinction of the dinosaurs; they can also appreciate the huge elephant family, including the famous 4-meter-tall and 8-meter-long elephant Rice's Yellow River Elephant and Shovel-toothed Elephant. The audience can also appreciate a very eye-catching specimen: the earliest angiosperm fossil - the world's first flower, Liaoning ancient fruit.