After carefully observing the structure of the first-floor bathroom, Lü Yang returned to the second floor.
The sink in the second-floor bathroom was noticeably larger. Comparing the two bathroom layouts, Lü Yang crouched down to examine the glass cabinet beneath the sink. The cabinet door was made of dark-colored glass, but it didn't look like glass; while it didn't reveal the inside, it reflected Lü Yang's face, resembling a mirror.
The glass cabinet door was locked with a snap-lock. Lü Yang pried it open and peered inside. There seemed to be some kind of mechanism that could open a hidden door, but after studying it for a long time, he couldn't figure out where it was. Not wanting to spend too much time on it, he used a hammer and pliers to forcefully break open a connection, finally o
