C979 There Is a Building Underground

Meng Baolu nodded, "Alright. The matter has to start from ten days ago… At that time, I was studying this drawing, trying to find out where the stone door was. However, after looking for so long, I couldn't find the exact location. Until one day…"

When Meng Baolu said this, the door outside was knocked again.

It stopped with a bang.

This time