After Chen Xiao saw the reminder from the system, he still had some surprises.

Because with the continuous lighting of the technology tree and the upgrade of the corresponding technology.

The system also needs to light up more technology trees and needs more influence.

A week ago, Chen Xiao had just seen the number of influence the system had.

Chen Xiao's cumulative influence has exceeded 18 million.

But still can't activate the technology tree upgrade.

The content of this chapter is being updated...