The pill recipe recorded on the scroll did not mention how strong the fire should be for refining these spirit herbs, nor did it specify the limit of purity for the extraction. It also did not provide detailed instructions on the order of refining and purification of various spirit herbs. These were the second set of difficulties that many Alchemists participating in the contest had to overcome.
Actually, alchemy had a subtle similarity to the mathematics problems of Lu Yun's past life.
Although a "problem-solving" tactic could not make up for the gap in talent, it could at least help one improve their performance rapidly at a certain stage.
Similarly, for an Alchemist, the more pills they refine, the richer the experience they accumulate. They would become more proficient in understanding the properties and effects of various spirit herbs and in controlling the fire. Sometimes, this proficiency could even enable them to draw inferences about other cases from one instance.