I'm looking for a time-travel novel from 14 years ago. The female protagonist (person) wears pajamas and travels to a jungle.

There was a 14-year-old time-travel novel where the female protagonist (human) wore pajamas and traveled to a jungle called "Through the Primitive Jungle." The plot of the novel was as follows: The protagonist of the novel was called Li Ting, a modern university student. One day, she suddenly felt unwell and lost consciousness. When she woke up, she found herself in an unfamiliar forest. She didn't know how this happened, but she soon found that her body had become too weak to leave the forest. In the jungle, she met some strange people, including a mysterious old man and a young primitive man. Li Ting realized that she had been involved in a dangerous game where the participants tried to survive and explore the mysterious jungle. Li Ting began to adapt to this unfamiliar environment. She learned how to hunt, fish, collect plants, and make survival tools. She also gradually discovered that there was a huge conspiracy behind this game. She needed to find the truth and stop the implementation of the conspiracy. In the jungle adventure, Li Ting encountered many difficulties and challenges, but she persevered and finally found the truth of the game. She realized that the game participants were all humans from the modern world. They were trying to find a way to return to modern society through this game. Li Ting decided to stop the game from going on. She launched a fierce struggle with the participants and finally succeeded in getting rid of the game and returning to modern society. The novel described the adventures of a heroine who traveled through the primitive jungle. She learned how to survive in an unfamiliar environment and discovered the secret behind the game. The novel's plot was compact and full of ups and downs. It was very popular among readers.