A situation similar to a primeval forest was usually described as a desolate and primitive natural scene filled with unknown dangers and mysterious forces. The following are some settings that can be used to write a time-travel novel: The animals and plants in the forest are primitive and mysterious existences. They keep their distance from the arrival of humans and try to understand their intentions. The transmigrator found himself in an unfamiliar forest surrounded by dense trees and vines. Only through the traces of birds and wild animals could he see the road ahead. The transmigrator needed to find food and water, but also needed to avoid fierce beasts and mysterious natural forces. 4. A transmigrator needs to have wilderness survival skills such as hunting, gathering, and building shelters to maintain their own survival. During the process of transmigration, the transmigrator will encounter various unexpected situations such as getting lost, encountering natural disasters, falling into swamps, etc., and need to constantly find a way out and overcome difficulties. The transmigrator would also face various identities and emotional entanglements, such as discovering that he was not his original identity or discovering that he had fallen in love with this mysterious forest. The above are some fictional scenes that can be used to describe the situation of a primitive forest. I hope that they can help those who write time-travel novels.