To reach the level of an Alchemical Master, one must refine a pill above the Earth Nether Level, even if it's just a Low-Grade Earth Nether Level, even if it's just one. But as long as you can refine it, you would be an Alchemical Master!
Take Ying Wang for example, or Konggu.
Similarly, to achieve the status of an Artifact Refining Master, it is necessary to refine equipment above the Earth Nether Level, whether it's defensive equipment, speed-related, or weapons. As long as it reaches the Earth Nether Level, that's an Artifact Refining Master!
Master Tao Yun and Master Minghuang both refined a piece of Low-Grade Earth Nether Level equipment, and that's why they were promoted to Artifact Refining Masters.
It is said that the Martial God Mountain, where Master Tao Yun resides, was transformed from the Earth Nether Level equipment he refined.
