Ji Yuefei and Yan Xiaoling, one is twenty-nine, the other thirty. Their ages are roughly a full cycle older than Gu Yuan.
Because they are cultivators, they can maintain their youthful appearance, which is why they seem quite young.
As for why they call Gu Yuan "Brother Gu," it's because Gu Yuan's strength surpasses both of theirs, after all, the strong are respected in the cultivation realm.
Additionally, neither of them is willing to admit their older age.
Regarding Gu Yuan, they know a bit; he is young and extremely gifted in cultivation, hence his current achievements.
Yet precisely because Gu Yuan isn't very old, they are even more skeptical of his words.
Gu Yuan is only nineteen, in such a short time, considering the time spent cultivating, is there any time left to delve into alchemy?
Even if there is time to learn alchemy, is such a short time enough?
Perhaps he hasn't even learned the basics of the alchemy dao?!
