Bab 338: Chapter 336: Walking in the Sky

"Is this a ventilation duct? I'm not quite sure either."

After embracing the round pipe, Bi Fang exhibited a rare sense of perplexity.

The duct was different from the usual, not smooth but with many small pipes protruding from it, offering cheap and suitable handholds for climbing. Among the selected routes, this ventilation duct was the easiest to ascend.

"This is somewhat similar to climbing trees. I have explained long ago that before moving, you must ensure the stability of every foothold. What you need to be mindful of this time is the presence of oil and dirt, which is common in factories. It's almost impossible to find any surface not smeared with oil in these areas, so be extra careful when reaching out for them."

Bi Fang stretched out his hand, showing the audience the black grease on his palm, which was very greasy and could easily smear off in large swaths with a casual wipe.