After a few steps, Zhao fan looked back and saw that the digger was on the ground, and there was no passage in Zhao fan's imagination. Did the digger dig in from the bottom of the ground? If so, how do these goblins orient themselves?

Zhao fan secretly wondered, slowed down his pace until he was parallel with Verne, and asked, "iron stone city is in the mountains, how do we get in? Is there no entrance? "

Verne explained, "yes, it's on the mountain!" After Zhao fan looked back and found nothing, Verne explained proudly, "there is a mechanism at the entrance, which is blocked by the boulder, so...