Why did jing yuan cut off Dafeng's fate?

In order to live a long life, jing yuan weakened the fate of Dafeng. At that time, the Emperor Joan of Arc was polluted by the clan leaders of the magic land, assimilated Chu Huaiwang and jing yuan with the technique of one gasification and three purges, and retired from the background by playing dead, secretly plundering Dafeng people, and in order to live forever, he did not hesitate to personally disperse the fate of Dafeng dynasty. Emperor jing yuan is the doppelganger of Emperor Joan of Arc. In order to live forever, he weakened Dafeng's fate.