Why didn't Li Han kill the saint of Yuan Sha?

Compared with the white-robed old man in the Star Palace, he was not harmed by the Holy Father of Yuansha. The elders in the Star Palace have no hatred or enmity just because of Xu Tianding and Li Han. There is nothing wrong with Li Han's summary of Brother Dan and the Xinggong killer. Cultivate immortality and be strong, while Li Han commits the lamella of the Star Palace. However, when Li Han became a monk too late, he didn't become a monk because he was far superior to the palace elders, and the elders were no longer difficult to pose a threat to himself, but he was still a killer because he had already threatened his own life. On the other hand, Li Han died when he was clicked by a sage of Yuan Sha in Kunwu Mountain on earth (Li Han escaped with the symbol of body double). In the spiritual world, the sage Yuan Sha was trapped in Li Han, and he pursued for several months, which once put Li Han in a desperate situation. If it weren't for Bao Hua's timely appearance, Li Han's escape would be a variable, so Yuan Sha Saint and Li Han are really sworn enemies, so it is unreasonable for Li Han to let Yuan Sha Saint go. Whatever the reason (the reason given by the rumor is far-fetched, which is not in line with Li Han's personality. I don't know if Li Han's personality has changed because of the advanced Mahayana, or if the rumor has grown from a teenager to a real man and relaxed his mind, hehe)