It's just that Concubine Lian's family is not very powerful, nor is it very outstanding. Yao Ji cannot imagine that King Hui would take the risk to build a secret passage specifically for her, so if there is a secret passage, it is most likely left by the predecessors.
After all, the more powerful a person is, the more afraid of death, so Yao Ji believes that when the palace was built, the ruler at that time must have spent a lot of effort to build a tunnel under the palace in case... (To be continued)