Yan's original strength was absolutely that of an expert in the Longevity Secret Realm. Now, to recover without any realm constraints, as long as there is enough Pure Yang Qi, he can directly soar.
However, even the Taiyi Sect does not have as much Nine Yang Sacred Water as a surging river.
Compared to ordinary cultivators, the Nine Yang Sacred Water is indeed a very precious thing. Although it is nothing for the Longevity Secret Realm, it is still very time-consuming to refine it in large quantities.
If Yan wants to fully recover his strength now, he will need at least ten experts of the Longevity Secret Realm or above to extract Nine Yang Sacred Water from the Immortal Realm's Spiritual Qi. This will take at least sixty years of effort. Otherwise, there is absolutely no way.