Emperor Jianwu summoned all the princes including Emperor Yonghe, Emperor Wenzhi, and others. Together, the princes watched the halted edge of the dense fog, exchanging looks of confusion. None of them had ever encountered such a situation, nor had they heard of anyone who had. The fog moved as they moved and stopped when they halted. What did this mean? Was it toying with them or was there some other situation at play?
After discussing once more, the princes decided to conduct an experiment to see what was really happening. They couldn't just stand there and let the fog wear them down.
The experiment was simple. There were over a hundred people in the group organized by the princes. They instructed the majority to halt, then had one person break away from the group and walk ahead. They wanted to see if this would cause the boundary of the dense fog to follow and move forward.
