Ye Xiao soon returned to the Ye Family. He had already planned to truly leave this world after refining its core. After that, who knows if he could meet them again or not? So, he came to spend a few years with this family of his in this world before leaving.
Now that he has already marked the location of the world's core, he gave the control of the Demon Race back to Yang Lang, causing him to lose a large amount of karmic luck, and at the same time, Yang Lang regained the karmic luck he originally had.
Ye Xiao was planning to spend a few hundred years with his family in this world. After all, no matter how many days he spent here, as long as he truly leave this world, only three years would have passed in the Divine Realm.