"It's indeed the national anthem, it's the people outside, it must be the people outside!"

The construction workers who also heard the shock before listened for a while, but could no longer remain calm.

"Yes, they're sending us a signal!"

Zhou Shuigen breathed a long sigh of relief.

"We are saved!"

The male student Cai He laughed.

"How did they come in?"

The female student teacher Milin is always a pessimist. As soon as she said something, her laughter and cheer came to an abrupt end and she was poured heavily by this basin of cold water.

"We first find a way to send a signal to the outside."

Zhou Shuigen looked at the stone wall.

"Let's knock together, the movement can be bigger."

Professor Zhu pushed the glasses on the bridge of his nose to support Master Zhou's proposal.

Everyone tried to find a way to find stones. Some people used stones, and some used tools brought in by construction workers. If there was really no, just use your palms.

Dongdong! Dongdong! Dongdong! Dongdong!

Li Bai, who was smashing the stone wall with an octagonal hammer, suddenly stopped.

Qing Jiao, who was wrapped around his arm, just reminded him that there was movement inside the stone wall.

"What's wrong?"
Chapter completed!