Who is the XuanYuanJian fortune teller in the first episode of Sky Mark 17?

Later, the immortal Gu Yue appeared with He Ran (Ran Weng), who lived in seclusion in the third biography of Xuanyuanjian. They are young immortals who live in seclusion in the deepest part of Xianshan Island, elegant and natural, with extraordinary temperament. It is said that his medical skill is the first and second best in the celestial world, which plays a decisive role in the development of the plot.