What is the relationship between Li Gui Dao and Li Chuyi?

The mentoring relationship between Li Guidao and Li Chuyi. The novel tells the story that Li Yiren taught Li Chuyi the skill of fortune-telling, but after Li Chu and his gang calculated their lives three times, Li Chuyi was killed by Wang Junhui and left him when he went to Kunlun for the third time. From then on, Li Chuyi showed his life not only to the living, but also to the dead. Li Chuyi has the top deification strength, and he is the strongest in Pangu world.