What is the basis of the first year of Daoli?

The Yellow Emperor, who was worried about his aging in his later years, later learned from a conversation with Gong that "everything in the world has a cycle of life and death, and only immortals can live forever." Then came the idea of pursuing the realm of immortality. He heard that there lived a fairy named Guang in Kongtong Mountain, who lived 1200 years old, so he asked him. Guang Chengzi told him to keep calm, calm down and continue to practice, so that he could shine with the sun and the moon and live with heaven and earth. Huangdi was greatly inspired by Guang's words. Since then, he has been studying Taoism with Guang. Later, an alchemist was needed to save people. After casting, Huanglong descended from the sky to welcome the Yellow Emperor to heaven.

I think it has something to do with this.