The cave where Xia Wanyuan was standing was surrounded by rock walls on both sides, barely able to accommodate one person.
Jun Shiling turned his body and held Xia Wanyuan's hand, signaling the person standing behind to retreat.
The professional technicians built a passageway that could withstand the collapse of the mountain just in case.
Under heavy safety protection, Jun Shiling gave Shen Qian an order. "Open it."
"Okay."
The people who had been prepared carefully followed the route they had long studied and slowly dug.
The rock layers here were much harder than outside. The staff dug for a long time but could not break through.
Xia Wanyuan had been standing at the side and watching. The mountain here was black, and the sound of digging was very crisp.
