The reason why such unspoken rules appeared was actually because of the unique rule system of the Dragon Flame Grotto.
If the master they took in was too low, for example, a low-grade top-grade or low-grade top-grade alchemist would take an alchemist below the middle-grade top-grade as their master. It would not take long for them to become an alchemist master.
At that time, they would have to give ten percent of the profits to their master. These new Alchemy Masters would naturally feel uncomfortable.
If his master was too high…These low-level Alchemists and Alchemist Grandmasters were naturally eager to do so, but those high-level Alchemists looked down on them.