[Strategy] The wind blew over and over again, and the grain merchant's seat sat on the top of the mountain, like a stone. The mountains in the distance are like chess pieces, and the world is a precious chess game. It's so tempting!
The grain merchant sneered: "Even if you are a chess piece, you still have to make a noise!"
Before Uncle Jiu was on his deathbed, he told the grain merchant a box that contained a secret. How could the grain merchant discover it step by step? What kind of test will he face?
