Introduction to Haibaihe Hall: mainly displays the fossils of a kind of marine animal - Haibaihe. About 480 million years ago, a strange animal appeared in the ocean, shaped like a budding lotus or a blooming lily. It was called "the outstanding ancestors of the earth" by paleontologists. After the crinoid dies, its posture is completely preserved and becomes a fossil. Due to the harsh formation environment, it is very precious.