It took Shen Yue less than three seconds to open the door. Feng Haonan, standing nearby, marveled at Shen's speed, thinking that he could give professional thieves a run for their money.
Once the bolt was broken, Shen Yue cautiously pushed the door open, trying to make as little noise as possible.
Feng Haonan, gun in hand, quietly slipped inside. After quickly checking the place, he signaled Shen Yue that it was empty.
In the meantime, Shen Yue had reached a particular spot on the floor by the wall. From outside, it seemed to be where some light was shining through.
Noticing an unusually smooth part of the floor, Shen Yue pressed down on it and found it to be a spring-loaded trapdoor.
This is the secret mechanism!
Hesitating slightly, aware that there could be an alarm trigger underneath, Shen Yue also drew his gun and instructed Feng Haonan to get ready.