C727 If You Fail You will Not be Rewarded

It wasn't loud, but it was loud enough to make sure everyone around could hear it.

As expected, everyone's attention was drawn over, including Grandpa Qi.

Gu Yuwei was very proud of this.

"This is the wisdom of our ancestor! If you look carefully, you will find that this curved beam does not use cement and there are no traces of nails on it. This is the structure of the tenon and tenon