C307 Distress Call

I sat in front of the computer, my mind full of questions!

The two of them stayed in the hotel for a total of three days, but no one came to their door to observe!

Then, how did that Devil Speaker know that Wang Yao had failed her mission? Had he set up a video monitor in the room, or was he able to observe every single movement in the room from a nearby location?

I rejected the first idea,