One day in half a month.

Wooden house underground.

Chen Mu stood at the end of the tunnel, and a pitch-black crack appeared in front of him.

There were bursts of cool air blowing in, and the sound of water rushing could be vaguely heard.

Chen Mu was surprised: "Could it be that this crack is connecting to an underground Yin River?"

Chen Mu was overjoyed: "If you can find a way along the Yin River, then you don't have to dig a tunnel."

Although he had this idea, he

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