Everything has a dead corner, how that thing rotates, there is also a place that can not be scanned. When it turns to the other side, Shen 13 greets two women. Three people quickly cross the camera and come to the bottom of it. This is the dead corner of it. They can't photograph the place below.

While waiting for the camera to turn around, Shen Shi-san moved forward to find a distance... In this way, Shen XIXIII excluded the covert head of surveillance, which was close to the door of the institute.

This gate, built by the cave, shows that the other side has made use of the cave...