Liujiaxia Dinosaur National Geopark Introduction: At Laohukou, adjacent to the upstream of the Yanguoxia Hydropower Station, there are geological relics of a large-scale dinosaur footprint fossil group that is rare in the world. These dinosaur footprint fossils were formed in the Jurassic or Early Cretaceous era and have a history of more than 170 million years. They are large in scale, have many types, are well preserved, have high definition, and have a strong three-dimensional sense. It appears on multiple levels, all of which are rare in the world. Among them is a sample individual, which is the largest dinosaur footprint fossil discovered in the world. It has extremely high scientific research and popular science value, and is also a very rare and precious natural landscape.