Why did dinosaurs lay eggs in Xixia County?

1993 In the spring, a news that shocked the world came from Xixia County, a small county in western China, where a rare dinosaur egg was found. Before that, more than 500 dinosaur eggs have been discovered, and this time more than 5,000 eggs have been unearthed in Xixia Basin. According to scientists' investigation, the underground dinosaur eggs have more than 1 10,000. For a time, many people thought that fortune was coming and went to Xixia for exploration. Why did dinosaurs lay eggs in Xixia?

It is speculated that dinosaurs liked to lay their eggs near the water, facing the sun and at higher ground. Before laying eggs, dig a round pit with your forelimbs, the middle of the pit rises, and then lay eggs around the pit. Eggs are arranged in a radial pattern, and each next circle is buried with a layer of soil, generally 2-3 layers, with a maximum of 3-4 layers, and at most 32 eggs are laid, and then young dinosaurs are hatched by sunlight.

Through research, scientists pointed out that Xixia belongs to the transition from northern subtropical zone to temperate zone, and naturally forms a slope with leeward and sunny direction. In the paleogeological era, Xixia was a basin with many lakes and swamps and a warm and humid climate, which was suitable for dinosaurs to survive.