With the passage of time, that iron corner in four or five powerful big man's continuous digging, finally exposed in front of the crowd's eyes more and more large area. Finally, when a piece of iron with the size of a big iron gate was set in this treacherous place, four or five bare-chested men wiped off the sweat on their faces, with incredulous looks on their faces. One of them exclaimed loudly:

"Professor Wen, Professor Zhu, there is actually a portal here! You guys, although this ...