C502 True or False

Leng Wuhen felt the energy from the painting and found it hard to believe.

This is … Built-in barrier? Leng Wuhen's expression could no longer be described as shocked.

Leng Wuhen had read about it in the organization book. Some of them had extremely complex and difficult to detect.

However, those were basically some of the older barriers, and the energy contained within them was enormous