The white paper represents the idealized state of the world when carbon neutrality is fully realized. According to the randomness of the roulette game, the white paper presents the state of the world when the output of greenhouse gases is excessive or the situation of energy conservation and emission reduction is insufficient. When people see more and more stains on the white paper, they will become more and more anxious, and the gambling mentality has become more and more big. However, achieving carbon neutrality will take time and cost, which will be affected by many uncertainties。