Su Yu smiled faintly, his spirits instantly lifted, said, "I understand now, Ada, thank you." He made up his mind. He wanted to take full control of "Black Iron City". Although staying in "Freedom Village" for slow development was a good approach, he needed to gather as much power as possible to prepare for the apocalyptic prophecy in about a year's time. He must have a powerful enough force, and Black Iron City's demonstrated intelligence and network were exactly what he needed urgently.
Think about it, in a year or so, if the whole world truly collapses, and there are countless "Heavenly Pit Forests" in this world. How much power would it take to find his own family in these numerous "Heavenly Pit Forests" in the first place?
Staying in "Freedom Village" for slow development clearly wouldn't be quick enough. This was the main reason why Su Yu wanted to take over "Black Iron City".