Night Plan

Use and be used, calculate and be calculated, betray and be betrayed. People in the world are like chess pieces, and the world is a chess game. What can be found in the world? Chess player. Cai Qin'er said: "Qi Wenheng, you can use me because I am willing to be used by you." But one day, Qin'er no longer wanted to be a chess piece: "You conquer the world, and I will conquer you." Who played whose chess game? ……………………PS: This is a story of intrigue and love.