C189 Focus on Protecting the Target

"Teacher! I think I found the key!"

Lin Yiqi ran to the bookshelf, and Yue Minglang also came over. She aimed at the lock and inserted it. It really matched.

The two of them exchanged a happy look. Lin Yiqi unlocked the lock and with a "Teng," the hidden box door automatically popped out.

The first thing she saw was a secret box