Chapter 91: Immigration Plan!

Meanwhile, at the Moon Base.

Zhao Yu entered the control room and spent 1000 technology points to exchange for the production line of the Hall thruster.

After the upgrade, all newly built nuclear-powered spacecraft could directly install the Hall thruster. However, the already constructed ships needed some modifications.

Leaving the control room, Zhao Yu discussed the modification with Uncle Da.

"Understood, Commander. I will arrange for the ships from various bases to come back one by one to replace the thrusters..."

Zhao Yu nodded and then asked, "How many ships do we have now?"

"About a hundred thousand, and most of them are transport ships..."

"How is the progress of the first defensive line?"

"It's at 18% completion. According to the current mining efficiency of Xiaotian, it will take about 15 more days to complete..."