Ling Chen single-handedly lifted the ring, opening the secret door on the ground. As soon as a one-meter-wide entrance was revealed, the porridge girl jumped in without a second thought. Roughly five seconds later, the voice of the porridge girl came up from below.
Confirming it was safe, Ling Chen immediately followed by leaping into the entrance. Below the entrance was a spacious corridor, at the end of which there was a door topped with a hidden miniature surveillance camera. After a glance at the monitor, Ling Chen and the porridge girl walked to the door with no regard for the surveillance, not even considering it an issue.
It's not that they weren't concerned about exposing their tracks; rather, their movements had long been exposed, so there was no need to hide.
Hu Fei had warned Ling Chen earlier that the building's security system was operated by top-notch hackers, so their actions on the top floor must have been known to the other party.
