C533 Discovered jade well water

"Yue Er, how deep underground can you feel it now?" After walking for more than a day, Wang Gongnan could not help but ask Wang Guyue.

"Father, Auntie Herb said that I can already sense the distance of 500 meters underground." Wang Guyue said.

"Oh, Yue Er, then how far away is the spring you felt it was?" Wang Gongnan asked again.

"Dad, I don't know. I can't calculate the distance