Without lighting here, the third floor of the shelter was now completely dark.
Rubbing the back of his hand, Su Mo opened the storage space and took out the flashlight inside.
He switched on the flashlight to illuminate the dark space. Bringing the three little ones with him, Su Mo walked up and arrived at the newly-changed second floor.
The various partitions were positioned like a maze, and the sunlight shining from the crop culture room on the second floor could not directly illuminate the entire space.
Su Mo found the stairs that led upward and, after climbing ten flights of stairs, they came to a passage.
At the end of the passage was the rotary-encrypted main door of the previous three-sectioned passageway.
Su Mo keyed in all the numbers and the bolt automatically retracted with a click.