C921 A Rescue from Zhou Zhi'er

With a faint click, Zhou Zhi'er stepped back twice, signaling that she had likely found what she was looking for.

Sure enough, the bookcase gradually slid aside, revealing the darkened entrance.

Zhou Zhi'er approached the entrance cautiously, leaning on the bookcase as she peered inside and softly called out, "Mr. Chen!"

Her voice echoed faintly through the secret passage