"Three Supplies and One Leveling" is a real estate term.
In simple terms, it means that before the formal construction of a project begins, the site must meet several conditions including water supply, electricity supply, road access, and site leveling.
Seated in front of Bai Xiaosheng, Li Ni, and others was Han, full name Han Dabei, who is employed at a moderately-sized engineering company that specializes in subcontracted projects. He was hired by a previous landowner to perform the "Three Supplies and One Leveling."
This plot of land, before falling into the hands of Zunbai Zhisheng, was paused in development due to property rights disputes.
Hence, Han Dabei and his team became mere watchers of the site.
After Zunbai Zhisheng acquired the land, they didn't have their own construction unit, so they continued to employ Han Dabei's team to maintain the status quo temporarily.
Of course, Ron was also actively dispatching people to communicate with major engineering firms.