In the Xiaoheishan Nature Reserve in Longling, Yunnan Province, 30,000 Alsophila spinulosa trees are sprouting new buds in the spring. From an aerial view, they look like giant green umbrellas! These "living fossils" are witnesses of the dinosaur era. They flourished in the Cretaceous period 140 million years ago. Walking into this place, it's like traveling back to ancient times and feeling the magical charm of nature. Come and find out!