After Gu Yun left, his study was basically Chang Geng's territory. Gu Yun, who had been floating around the border for many years, was somewhat unfamiliar. Chang Geng supported him and sat down. The sunshine hit the face of the people in the study from a very familiar angle. Gu Yun suddenly felt something and stretched out his foot. As a result, he met a small bench under the table: "This thing is still there."

Chang Geng bent over and picked up the stool. He saw a few vivid little turtles painted on the wooden stool, biting each other’s tails and forming a circle. The childish handwriting beside it was engraved with the words ‘Although the tortoise lives long*, if our forces are ten to the enemy's one, surround him’**.

*A line from a song of Cao Cao.

** A line from Art of War

... It didn’t even make sense.

Chang Geng smiled for a long time, took Gu Yun's hand and pressed it on the mark, he asked, “Did you carve this?"

"Don't laugh, I did not have many days where I seriously read books when I was a child," Gu Yun looked up slightly. "Books were all read in the palace with the Emperor and Wei Wang. The old Marquis' own education was very ordinary, he was only a bit more diligent with military books. He found an old horrifying Confucian teacher here to read for me, he would doze off after a moment, I could only find entertainment for myself - well, you could go do your things, I haven't been home for a long time, let me walk around for a bit.”

"No," Chang Geng said hurriedly, "I'd like to hear you tell the story, and afterwards?"

Gu Yun was a bit hesitant. It was not any grand achievement, but Chang Geng seldom enjoyed himself like this. Gu Yun paused for a moment, then finally decided to bring out this embarrassing deed to entertain him, "I was very troublesome at that time, even the teacher was afraid of me from all the tricks I pulled to torment him. He dared not scold me face to face but ran back to tell the old man about it. Besides beating people, the old marquis punished me to take a stance on the stool, falling off with only a slight tremble. He did not appear like a goddamn blood-connected father no matter how you look at it. Later, I thought that old man goatee who kept running to tell on me day after day was simply too annoying, I came up with a scheme with Shen Ji Ping, we stole some laxatives and poured it into the teacher’s tea.

"Laxatives aren't anything much, but we were both young, and didn't know our limits. The teacher was already old and frail, almost dying from it. Throughout two hundred years, the Gu family had never had a house wrecking and crazy child like this, the old marquis was enraged, wanting to beat me to death, fortunately, the princess stopped him.