There were many conjectures, but even now, there was no unified or definite explanation.
All they knew was that it had only appeared after the Mount Tai Incident.
"...There was a crack, and this thing was picked up from inside." Zi Xing looked at Long Xiruo with a solemn expression. "In the end, we could only reach a dilapidated ruin. Traces of a great battle were left everywhere. We didn't see a single corpse in any of the areas we could explore. The entire place seemed deserted. What we saw was a place called the South Heaven Gate."
The South Heaven Gate... the gateway to the legendary celestial palace.
The True Dragon of Shenzhou said nothing. She only stared expressionlessly at Zi Xing, as though trying to determine whether her words were true.
"Dragon Lord, do you think Zi Xing is making up a story?" Zi Xing suddenly asked.
Long Xiruo shook her head and said indifferently, "I'm just curious why you happened to encounter something like this."
Zi Xing was slightly stunned by the question. "This... is there something wrong with that?"
Long Xiruo shook her head again. By then, she had taken the fragment back into her hand... She carefully stroked the markings on it. "You came to me because you want me to continue exploring this space, which may be the celestial palace, with you?"
"Fengdu Ghost City." Zi Xing abruptly said the name of a place, then continued meaningfully, "I know the origins of Fengdu Ghost City... Dragon Lord."
Long Xiruo's expression shifted slightly, but she suddenly smiled. "You little girl, it seems you've done your homework... Then here's the question: what makes you think I'll agree?"
"I hope Dragon Lord will consider it." Zi Xing knelt before the True Dragon of Shenzhou, her head lowered.