The cultivation methods of the Qianyuan realm came from three sources. The first was brought or taught by Immortals from the outside world. The second was the mortal slaves that could be teleported, as well as some that were picked up during the great wars between Immortals. The third was the comprehension of cultivators.
In fact, it was more like what the Qian Yuan world taught the cultivators when they entered a state of the unity of heaven and man. The purpose was to make the cultivators more compatible with themselves, which would drive the development of the Qian Yuan world. However, no one expected that it would lead to disaster.
In fact, if the Qianyuan world did not show the consciousness of the heavenly path, the immortals of the void Dao sect might not have been so ruthless. There was no consciousness of the heavenly path in a macro world. Golden Immortals controlled the power of the heavenly path. Otherwise, they could not be called the sect ancestor.