As the forklift disappeared around the corner, Zhang Heng had already crawled about a third of the distance. That meant he was out of the security camera's range of sight. He then dashed to where the advanced worker display board was before the second forklift came out.
That display board, too, had helped him block the vision of another camera on his left, and instead of going forward, Zhang Heng took advantage of this rare opportunity and crossed the road. Finally, he had arrived at workshop No.1. He began to climb up the roof via the pipe attached to the wall; all in a timely affair, just as the second forklift emerged from the opposite corner.
Zhang Heng patted the dirt off his body. The loud workshop had helped him mask the clanging pipes as he scaled the wall and the walking on the roof.