Chapter 469: "How I Long to Meet You.

Xiber turned back.

A wobbling figure was approaching from behind them, clad in a tattered leather coat, hair disheveled, cheeks smeared with coal-like dirt, even the legs of their pants were marked with mud and leaves. They seemed as though they had been through a long journey.

On their face was a pair of glasses, and on their wrist a watch. Clearly, these items were not produced in Qiongdi.

...This person was a stranger.

Ming'an had heard before that occasionally, people from the outside world would accidentally pass through the Black Wall and come to Qiongdi. Since the Black Wall had entry but no exit, once they arrived they couldn't leave and had to settle in Qiongdi, much like Teacher Fang who sponsored Xiber.

However, these strangers generally had blurry memories and even their sanity needed a long time to recover, likely a negative effect of passing through the polluted barrier.