Selena had calmed down for a while, now felt her heart pounding again. She still stopped the sense to not run away, which was considered extremely courageous. After stopping for a moment, she saw no one there again. She heard the sound, and he could neither move forward nor stop. After hesitating again and again, she had no choice but to bite the bullet and walk around the rusty iron, and then slowly move towards the direction of the sound.

As I got closer, I saw that there was a relatively flat stone on the inner wall of the cave, which should have been a resting place for passers-by. At...