C333 Skull key

The servants clearly saw Zheng Changyuan return to his room, and as usual, turned off the lights and went to sleep, but now, Zheng Changyuan was not in his room, so where could he be?

In the darkness, Gu Shiyi and Situ Jing made a gesture of mutual understanding, and then started to look around the room. There must be a mechanism inside.

In the dark secret room