As for the fourth-order combat power, it is still relatively rare, and strictly speaking, only Su Yu himself and those Mechanic descendants' fusion technology can reach the fourth order.
No one else can.
Actually, in these twenty years, Su Yu has been able to cultivate fourth-class mechanical soul battle armor.
Mainly because strong warriors like Tie Long at the third rank have not yet gathered enough energy coins needed for the fourth-rank battle armor, they can't find Su Yu to exchange, and Su Yu cannot give it to them for free.
Even without fourth-order battle power, these cities combined have already become a true human civilization, rather than a solitary Mechanical City as before.
These people have secretly called it the name Mechanical Empire, but without Su Yu's consent, they dare not hang the name out yet.
There is communication between cities, when the population reaches one billion, they will apply to Su Yu to establish an empire and restore the glory of humanity!
