Of course, that's impossible. The Southern Underground Palace must be within the royal mausoleum.
"Zimo, do you think the Southern Underground Palace could be within another underground palace, as part of a sub-branch?" She asked.
Could that be a possibility?
At this thought, she suddenly remembered how they almost got discovered by Emperor Ziyan's men last time. To avoid detection, she and Prince Niu hid in a subsidiary section of an underground passage.
Later, they revisited that branch, only to find it led nowhere but to a dead end!
Thinking of this, she turned to look at Sui Zimo, only to see that he was also looking at her at that moment.
"You thought of it too, didn't you?"
"That place wasn't destroyed in the explosion," Sui Zimo said, stroking his chin.
"It seems very likely that it's that place. We must have been too hasty last time, not finding the mechanism to get in. If we look again, perhaps..."