C624 Wall dong and backwall dong

The light of dawn dispersed the darkness, but it was unable to dissipate the mist in Xia Lei's heart.

During this entire night, Xia Lei kept imagining the identity of that "I" and the era that "I" lived in. The identity of that "I" could not be guessed at, and according to his description, he lived in an era before the Ice Age. And his story should have ended in the Ice Age.

This point