The Tunnel and the Mars Base

The Energy Overflow Tunnel was the most important resource on Mars at the moment. It was also one of the most mysterious places on Mars. Currently, among the five major Mars bases established by humans on Mars, every base has an Energy Overflow Tunnel.

An Energy Overflow Tunnel would appear during the energy tide on Mars. After the energy tide ended, the Energy Overflow Tunnel would also dissipate.

However, after humans set foot on Mars, they had gone through many aspects of research, including the research on the former abandoned base and the way the alien invaders used the Energy Overflow Tunnel.

They discovered that the Energy Overflow Tunnel could be fixed for a long time through special technology. So the five Mars bases were based here. The Energy Overflow Tunnel that had been fixed for a long time would continue to surge out energy after the energy tide ended.