Ye Chong had built 62 labor machines. Each labor machine was fitted with a low level bio-photon processor. Ye Chong did not mind the relatively primitive photon processors, since they were easy to make.
Using unidirectional culture methods, Ye Chong could grow large numbers of low level bio-photon processors in a short time. It was the actual labour machines that took time to build. Local wooden materials were as hard as metal alloys, but not as easy to process as metals. There were many minor tweaks that Ye Chong had to manually interfere with. Without this manual part, he would have built 620 machines, and not just 62.
The machines were designed to do laborious physical work, so Ye Chong named them appropriately so. There was now a large heap of earth at the rear courtyard of his manor. Ye Chong had dug 60 meters further down from his laboratory. Kui's chip had information on how to build underground bases, and all the experience they gathered from building the base on Spectre.