More than five thousand kinds?

Hearing this, the whole audience was silent! It seems that the alchemy skills of the first to fourth grades are of no use to them, right?
You must know that all these cultivators present are top cultivators from outer sects, and each of them has cultivation above the third level of Spiritual Master. The alchemy skills they need now must be at least of the fifth grade, because only fifth grade elixirs are useful to them.
"Uncle Su, you won't teach us alchemy techniques above the fifth level?"
At...