Pharmacy 19 was located pretty far away from Mo Wuji's residence. He spent three minutes trying to get to the entrance of Pharmacy 19 even though he sprinted all the way here.
Each of the pharmacies had an accompanying pill lab and therefore, Pharmacy 19's corresponding pill lab was Pill Lab 19. Mo Wuji also found out why Pharmacy 19 had the least number of pill refiners who came here to refine pills.
The answer he got was that the success rate of refining a pill was very low in this particular pharmacy. It did not matter who came here to refine pills, the rate of failure was just way higher than any other pharmacy and the difference was not simply a matter of a few percentage points. As more people heard about this, they stopped trying to refine pills at Pharmacy 19.
