With just a slight tension, Du Heng's mind immediately cleared.
He had seen many such sinkholes when he was a child. They were usually caused by poor drainage in the fields, compounded by rat holes or loose soil.
For such sinkholes, there had to be an outlet below. Now the question is, where is this outlet?
Du Heng quickly recalled childhood memories, then leaned over the top of the hole and carefully observed it again.
This time, with conscious observation, Du Heng saw a faint light coming from below.
There's light!
Du Heng was immediately overjoyed.
Since there was light, it meant there was an opening to the outside. Even if it wasn't the outlet, the earth there definitely wouldn't be very thick, making it easy to dig through.
Du Heng reconfirmed the approximate depth of the hole and immediately jumped down from the edge of the field.
