Jin Chanzi is the favorite disciple of Tathagata Buddha. He was demoted to a layman by Tathagata Buddha for openly challenging Buddhism. He needs to experience the suffering of reincarnation to understand the mortal world and let Jin Chanzi know the teachings of Buddhism.
Jin Chanzi spent ten lifetimes seeking the Tao in exchange for seeking scriptures from the West a thousand years later, just to find an answer to Buddhist meaning.