C1384 How could this be?(part i)

After mustering his courage, Long Tianci finally pushed open the door of the eighth laboratory, and then walked in. Long Tianci was extremely nervous as he felt an abnormal feeling of pressure in his heart, as though he was pressed down by a huge rock, making him unable to breathe.

Because he was not used to the darkness, Long Tianci, who had walked in from outside, could not see anything