C679 Bulletproof Vehicle

"Director Niu, your theory has really given me a headache. Tell me, how can I treat my boss?" Black Tiger said.

"I don't know yet, but I know there's a way to ease it." Principal Niu said.

"Then tell me." Black Tiger was almost on fire, but the old man still didn't show any signs of movement.

I saw this method in an ancient book