He then pulled with both arms, grabbing the lower edge of the duct's opening.
He then flattened his body and used his momentum to slide inside.
Agile as an eel, he applied the techniques of Iron Bone, the 3rd Floor of the Golden Stone Fighting Skill, to move as quietly as possible.
And so, the two of them crawled deeper into the ventilation duct, one behind the other.
"RAT-A-TAT-TAT-TAT-TAT!!"
The roar of submachine guns and machine guns erupted once more, and Lu Chao could even hear the clatter of spent casings hitting the ground.
The ventilation duct ran along the factory ceiling, over ten meters above the ground. The exit's location was more or less where the old security guard had said it would be—level with a steel crossbeam, making the crawl only a dozen or so meters long.
The duct was sealed with sheet metal, but after years of disrepair, its outer surface was corroded and yellow with rust. A few tiny gaps had opened up along the welded seams.
