C448 Sub Sound Wave Cultivation Room

"Pata, pata, pata..."

Lin Feng walked slowly to the end of the corridor. What surprised him was that as soon as he walked to the front of the metal door, the electronic system on the door issued a warning.

"Beep! Identity denied. Please do not approach!"

F * ck!

I am just passing by, do you need to be so sensitive?

Lin Feng frowned and took a step back