C1932 There's also a cave

There is another cave

"They seem to have discovered something." Li Shiyu said softly.

The old tutor looked down and snorted coldly. He didn't speak, but continued smoking his pipe as if he already knew what these people were up to.

Li Shiyu looked at the old man, then looked at Yu Ming.

Yu Ming shook his head at Li Shiyu, he did not know what the old man meant either