Xu An leaned in, puzzled, and asked, "What does this mean? Do we have to wait until the transition between day and night for the door to open?"
Shen Jingqi nodded and said, "It's very possible. But we don't know exactly when that transition occurs, and even if we did, it's hard to judge time in this dark building."
The two of them fell into thought, and the atmosphere around them grew more oppressive. Just then, a strange sound echoed, like the low growl of some creature or the howling wind through a narrow passage. Shen Jingqi and Xu An exchanged glances, their eyes filled with fear.
"What is that sound?" Xu An asked nervously, instinctively moving closer to Shen Jingqi.
Shen Jingqi perked up his ears, listened carefully, and said, "I don't know, it sounds a bit frightening. Let's be careful." As he spoke, he picked up a wooden stick from the ground, gripping it tightly in his hand, and looked around warily.
