C149 The Whole City Was Mourning the Hero's Gift

The spatial rift was also known as the Space Channel, and it was divided into one-way and two-way Space Channel. The spatial rift on Earth was a one-way passageway, and could only be entered from the outside, and not return.

The two-way Space Channel, as its name implied, could be entered or exited. It had to be established and stabilized by humans in order to form a safe two-way Space Channel