How did Ah Ning end up in Grave Robber's Chronicles?

Ning was a main character in Grave Robber's Chronicles. Her ending in the story was rather complicated. At the climax of the novel, Ah Ning, Wu Xie, and Fatty worked together to complete the task of the bronze door. However, when the bronze door was opened at the end, Ah Ning was unexpectedly trapped inside the door. In the door, Ning encountered many difficulties and dangers, but she always adhered to her beliefs and principles and finally succeeded in finding a way out. After she left the door, she found that she had become a real archaeologist and had been contributing to the country's archaeological cause. Although Ning's ending in the story was tragic, her persistence and hard work made her a real hero.