The Kan is a brave man. A brave hero. He dares takes the bet.
If he loses, there is a chance that the Kan greatest ambition could not be realized.
But if he won, he could realize his ambition with the fastest way possible.
The Kan could kill him at that time and follow his initial plan. But Jayeux shows him another way.
And that is why Jayeux survives.
When Lu Xiao hear this he could not help but be shocked. He was shocked that Jayeux manages to change the mind of the Kan. The hardest thing for people in the tribe is none other than changing the mind of the Kan
Because of his prestige and his victory, and his smooth journey, everything ahs to follow his will. And rarely there is anyone that could change his mind. Even though Lu Xiao himself is not close to the center of power and did not see this behaviour in front of his eyes, it is not like he is deaf