Chapter 186: Black Rock Tree Monster

Su Han's lips curled into a smile, because this type of structure, although it might fall short of a wall entirely made from poured concrete, was sufficient.

But it was already enough.

If the strength wasn't adequate, then they would add more steel rebar. If that still wasn't enough, then they would build thicker walls.

His testing hadn't ended, but he directly asked for Zhang Dahai, who was preparing to follow the infrastructure team to explore other subway tunnels, to be called over.

"Boss, you looking for me... Oh, new laborers?"

"..."

Su Han's expression twitched slightly, although he knew that in addition to being combat units, the descendants had another important role—as production units.

As typical people from Xia Country, everyone seemed to have a talent for developing the descendants as tools of production.

For instance, many in the infrastructure team had voluntarily entered into contracts with the Tree-born Worms and Vine Giant Rats.