What is the relationship between Yuan Tiangang and Li Chunfeng in history?

The relationship between Li Chunfeng and Yuan Tiangang

The theory of master and apprentice: There are rumors that Yuan Tiangang lives near Panlong Mountain in Langzhou. He has extensive knowledge and is famous. Li Chunfeng admires him very much. With his knowledge, he came from a far away place with money to become his disciple, and together they wrote the book "Four Marbles", which was later proofread by Liu Bowen of the Ming Dynasty.

About good friends: Yuan Tiangang and Li Chunfeng were classmates who studied together. The two often got together to discuss knowledge such as astronomy and Yiyi, as well as discuss ancient and modern affairs. It is said that Yuan Tiangang and Li Chunfeng sat back to back, one was responsible for writing and the other was responsible for painting, dividing the labor and combining the Qishu.

Li Chunfeng and Yuan Tiangang were very famous divination people in the Tang Dynasty. They respected Taoism. Their relationship was either master and disciple, friends, or nothing at all. It was just because of their similarity to later generations. Experience and artificial connection brought them together. The story of Li Chunfeng and Yuan Tiangang that has been handed down now cannot be verified.