The stegosaur is an animal belonging to the family Stegosauridae in the suborder Stegosauria of the order Ornithischia, also known as the Bone Plate Dragon. The head is small, and the tip of the mouth has a bird like pointed beak without teeth. The teeth are distributed on both sides of the mouth and are very small. Jianlong is named after its large sword board and sharp tail spikes on its tail. Jianlong is distributed in China, the United States, and the United Kingdom, and lived from the mid to late Jurassic period to the early Cretaceous period. Their diet is herbivorous. Jianlong is a giant dinosaur with a peculiar appearance, known as the "roofed reptile" by people.

Brachiosaurus is a general term for the "Brachiosaurus genus" dinosaurs of the Jurassic period. The body length is 25 meters, the height is 15 meters, the weight is 30 tons, the tail is thick and short, the head is small, the neck is long, and the appearance is similar to that of a giraffe. Brachiosaurus lived in late Jurassic North America and early Cretaceous North Africa. Mild temperament, enjoys living in groups. Feed on leaves and tender branches. Often foraging together. During walking, females lay eggs. Dinosaur eggs grew up alone without a nest or parental care. Brachiosaurus was one of the largest dinosaurs of the Jurassic period, and its name was once used by astronomers to name an asteroid.