During the math competition, the boy next to me closed his eyes, pinched his fingers, and wrote down the answer that I couldn't figure out after two hours of calculation.
Me: "Are you a magic stick?"
Him: "I am from the Department of Archeology."
Later, he used hexagrams to help me solve the case of theft of a bronze mirror, the case of a missing USB flash drive, and the stock market crash warning.
I used data to prove that he is not a magician.
Later, his grandfather's copper coins came into my hands.
He said: "My grandfather gave it to his grandson-in-law."
Me: "Then your grandpa has good taste."
