The soil around the hole's opening had fresh, distinct marks from being stepped on and brushed by clothing.
A cool draft, a mix of soil, must, and a faint, indescribable chemical smell, emanated from within the hole.
"I'll go down first!"
Xiaoliu volunteered. His build was relatively slim and agile.
He put on a headlamp and gloves, took out a high-powered flashlight, and checked the gear on his belt.
"Be careful. Stay safe. Bai Wan, you go down with him. If there's anything, signal us immediately."
Yang Qi patted Bai Wan's back.
Bai Wan let out a low "whuff" in understanding.
Xiaoliu took a deep breath, got down on his stomach, and carefully lowered his feet into the opening.
After landing, he turned on his high-powered flashlight and cautiously scanned his surroundings.
"It's clear. The hole isn't big, looks man-made, and it's dry inside."
Xiaoliu's voice echoed up from below.
"Bai Wan, go," Yang Qi gestured.
