“That’s correct,” said the old man. “This military classic belonged to the number strategist of the Han Dynasty, Zhang Liang, and it’s been passed down in my family for ages. This thing is very special, and it’s been with me for seventy years. That’s why I have not encountered any big calamity until now. According to my ancestors, the spirit dwelling in the book specializes in dealing with disrespectful young people. That’s why I thought about using it to give this city law enforcement officer a lesson.”

“Then, why did you need to diverge the water stream and flood his father’s grave?” I asked.

“Actually, in the beginning, I didn’t want to use the ‘Three Strategies of Huang Shigong.’ I just wanted to flood his father’s grave, which would make his father come back and teach him a lesson himself. However, this kid didn’t change. He returned...