C417 Chapter 417 mysterious ancient well

Ye Ya could not find any clues here, and he had no other way. He thought for a moment, then casually picked up a brick and threw it into the well. After throwing the rock inside, he wanted to hear and measure the height of the well.

However, what surprised Ye Ya the most was that the stone he threw down did not make any sound, because normally, when he threw a stone into the well