Microraptor Gui was discovered in the Jiufotang Formation in western Liaoning,China. Microraptor Gui is a kind of dromaeosaur dinosaur under the order of theropods. It was born in the early Cretaceous period 120 million years ago. Its body length can reach about 77 cm. It mainly eats meat. Traces of flying feathers were observed on its tail and fore and hind limbs, so it became the first flying dinosaur to be discovered, and it also caused another controversy in the paleontological community about the origin of birds.