Tian Yan never expected the opportunity to come so quickly.
Ying Zijin has not been at the Engineering Institute these days.
She happened to overhear a conversation between Ye Siqing and a few other group members, learning that Ying Zijin had actually left the City of the World.
Although there are only a few fixed passageways in and out of the City of the World.
Due to factors like spatial dimension, some other exits might appear.
This is why incidents of missing planes and ships on the Seven Continents and Four Oceans keep happening.
As long as the people involved are still alive, they've accidentally entered the City of the World.
It's not time yet for the research institute to issue exit permits, so how else could Ying Zijin go out besides sneaking out?
This engineering secret may not mean much to the Engineering Institute, but it can indeed advance technological development across the Seven Continents and Four Oceans.
