Previously, when Chen Fei saw the Yashan Army besieging Shang Wu City, he had some doubts in his mind. Clearly, there was a much weaker Qinhai City nearby, yet the Yashan Army chose to target the stronger Shang Wu City.
Although Shang Wu City possessed more resources compared to Qinhai City, it wasn't to the extent that the Yashan Army needed to go all out to capture it.
Now, as Chen Fei looked at the contents of the jade scroll, he began to understand. Inside Shang Wu City, there was actually a small entrance to a hidden place, controlled by Shang Wu City.
Calling it a hidden place might not be entirely accurate; it was more like a small cave dwelling. While the cave dwelling was much smaller than the mystic realm, the spiritual energy within was just as dense, if not more so. What was even more crucial was that this cave dwelling had been owned by someone in the past.
