"Jiang Yan, there's a switch inside! Open the door first! Let us in!" Song Qian's voice suddenly came from outside the metal door.
"We're running out of oxygen in here!"
Jiang Yan realized, Ye Qing and the others were still outside. She quickly halted and turned on the flashlight on her submachine gun, scanning around the metal door frame.
Indeed, one meter to the right side of the metal door, there was a square-shaped transparent bulge with a lock core.
The bulge seemed to be made of top-grade bulletproof glass. Despite the intense collision, it only showed a fine spiderweb crack.
Inside the bulge, there was an inner-red and outer-yellow button, strikingly similar to the one Mo Jingsheng had told her about when she went to collect Gold in the vault.
She took a step back and raised her gun towards the bulge.
"Bang!" A crack appeared, significantly larger than the previous one.
"Psh psh psh psh!" She fired a burst of shots again.