Upon seeing the manual of "Elemental Qi Fusion Method of Heaven and Earth" for the first time, Shen Yuan made up his mind to obtain it.
Because this was the first manual related to Qi of Heaven and Earth that Shen Yuan had ever seen.
Even among the tens of thousands of manuals on the cultivation forum, there were merely a handful that mentioned Qi of Heaven and Earth. The majority required some kind of Qi of Heaven and Earth during the cultivation of their secret cult-suppression techniques.
There were almost no details on how to obtain the Qi of Heaven and Earth, nor how to condense it. Even the rare mentions would only say something along the lines of 'Great Cultivators at the Qi Training Stage can refine the Qi of Heaven and Earth for their own use.'
Shen Yuan suspected that this was due to the editing by the Imperial Astronomical Bureau and various sect forces. They did not want to leak any information about the Qi of Heaven and Earth to the outside world.