But Fang Yun deliberately wrote only half of it, hesitating and dragging things out. Only after he was sure the old man would not appear again did he write down the final answer.
Having passed the First Pavilion of the Second Mountain, Fang Yun received the Holy Light Baptism for the fourth time, then entered the Second Pavilion of the Second Mountain.
The plaque on this pavilion bore the words "Geography."
Fang Yun felt his vision blur, and suddenly found himself in an exceptionally familiar place.
The small river outside Ji County!
Fang Yun immediately became wary. Though he often claimed to think by the riverbank, he only said so because he had no other choice. The old Fang Yun had liked spacing out by the river; if he claimed he had been widely read since childhood, he would inevitably be exposed.
Fang Yun stood by the riverbank and waited quietly.
The old man appeared beside him once more and asked, "The Second Pavilion tests geography. Since you often think along this riverbank, you must have noticed that the water on the north bank is shallower than that on the south bank. Is that correct?"
Fang Yun vaguely understood what the old man was testing and immediately said, "Indeed. I noticed it long ago."
"Then do you know the reason?"
As Fang Yun thought, he said, "I was merely curious before and never gave it much thought. Is this one of Book Mountain's questions this time?"
"It is."
Fang Yun slowly said, "There is little wind here, and the terrain on both sides is very flat. The current would not choose between deep and shallow water. Therefore, the only possibility is that the land beneath the river creates a certain force. That force makes the current along the south bank