It's been four days since Zhang Ye has been living on the island, and the cost of ten Yuanyuan Dan per day has basically turned him into a poor ghost. Currently, he only has nine Yuanyuan Dan left, apart from those treasures he obtained.

  "Go to the medicinal materials market and buy these things back."

  Zǐ yī hū rán chū lái zài le zhāng yè de shí hǎi lǐ, liú xià le yī chuàn zì fú.

  Translation:

  Purple clothes suddenly appeared in Zhang Ye's sea of consciousness, leaving behind a string of characters.

  Zhang Ye quickly memorized it and didn't dare to slack off. He first went to the market, had a round of negotiations, and finally sold a flying sword for 500 Yuan Dan after some haggling.

  The original price of a third-grade flying sword was around 600 dan medicines, but selling one with someone else's spiritual imprint on the black market would incur an additional fee. The remaining spiritual imprints had to be cleared by specialized flying sword dealers at the cost of hiring an expert, resulting in some loss.

  In this way, Zhang Ye immediately became a wealthy man with a full wallet again.

  Went to the medicinal material market and bought a total of twenty portions of auxiliary medicinal materials according to the list provided by Zǐ Yī. This trip cost around two hundred Jù Yuán Dān.

  Juyuan Dan is a second-class Dan medicine and is considered a standard unit of measurement.

  In addition, the Huixiang Dan used for recovery is also a third-grade dan, with a value equivalent to ten times that of Juyuan Dan. It's considered a commonly used dan medicine by people with higher cultivation levels and is also a hard currency. The value is ten times, but in fact, when calculating the actual medicinal power, Huixiang Dan's medicinal power is only about eight times that of Juyuan Dan.

  The reason why the value is higher is that people with high cultivation need to take a large amount of Jiyuan Dan, so it's more convenient to carry and take Huixiang Dan, which naturally makes its value higher.

  Returning to the seaside hut with enough medicine, Zhang Ye dove headfirst into the gourd. After one last care, the twenty Ling Huang grasses he had planted last time finally all matured.

  Ling Huang Cao is the most common herb and also the one that is planted the most by various sects. The main medicine for replenishing Dan is Ling Huang Cao. Therefore, among the three types of seeds Zhang Ye took last time, most of them were Ling Huang Cao seeds.

  "Ling Huang Dan is a fourth-grade elixir, generally speaking, its medicinal power is seventy-five times that of the Ju Yuan Dan, and its value is equivalent to one hundred Ju Yuan Dans. The conditions for refining a fourth-grade elixir are first, a fourth-grade elixir furnace, and second, a fourth-grade main medicine. However, this is only basic and does not guarantee success in refinement. Therefore, generally speaking, sects that specialize in refining elixirs for a living will use fifth-grade elixir furnaces to increase the quality of auxiliary medicines and raise the success rate.

  Zi Yi appeared in Shi Hai's mind, "Now, you can only cultivate fourth-grade main medicine, and your elixir furnace is also only fourth-grade. With your current cultivation level, you can only barely control a fourth-grade elixir furnace, so let's refine a fourth-grade elixir: Ling Huang Dan. If you have a three-layer success rate, then for the time being, you won't lack money to spend."

  Zhang Ye roughly calculated that buying the auxiliary materials was equivalent to consuming two Ling Huang Dans. According to Zi Yi's formula, he currently had enough materials for twenty sets. Indeed, as Zi Yi said, with a success rate of just three layers, there would be profits to be made. Of course, with such a low success rate, the profit wouldn't be very high and could only be considered as compensation for his hard work.

  After all, the cost of Zhang Ye's cultivation of the Four Spirit Emperor Grass was not included. The cultivation of the Spirit Emperor Grass required not only the investment of spiritual fields but also the long-term hard work of Zhang Ye.

  And that's just for Zhang Ye. If it were someone else, planting the Four Treasures Ling Emperor Grass would require investing in four treasures land and four treasures seeds, which would be a staggering cost.

  Zhang Ye prepared the medicinal materials for twenty sets of alchemy, and Zi Yi spoke in a soft and gentle voice, very detailedly explaining some key points in the refining process. This included how to control the four yang fire arrays within the dan furnace.

  Zi Yi was exceptionally patient during the explanation, although her attitude was very cold. However, she carefully explained all the key points to Zhang Ye, and at this time, she answered every question he asked.

  Zhang Ye remembered everything and asked for details about many key places. After finishing everything, it was already late at night again. This lecture actually lasted a whole day. Compared to before, cultivating or comprehending any mantra is much more troublesome.

  Afterwards, Ziyi didn't say another word and went back to meditate.

  Zhang Ye repeatedly pondered the things Zi Yi had explained, and after a while, he started to feel dizzy. There were too many crucial points in this process - mastering the fire timing for each stage, the timing, rhythm, and sequence of adding over a dozen medicinal materials to the alchemy furnace, all of which were important.

  And there are many things that cannot be conveyed in words and can only be made up for by practice.

  It's like a top chef's growth, it's impossible to operate according to recipes and produce master-level dishes.

  The next day, Zhang Ye went over the steps of alchemy he had learned yesterday once again.

  Something very strange happened, as if he had revised the law of the past, and he vaguely disliked the "Essence of Alchemy" he recorded last night.

  He followed his intuition and made a crucial revision once more, as per usual.

  This time it's much more pleasing to the eye.

  Let's not think too much about it for now, even if there will be 3.0 or 4.0 versions in the future, they can be modified slowly during the alchemy process.

  Prepare the materials. Zhang Ye intended to summon Shenmu Wangding, and after infusing his magic power, Shenmu Wangding began to rotate and slowly grew larger.

  Zhang Ye put in some of the medicinal materials according to the steps.

  Sigh...

  After the true energy was activated, the Four Yang Fire Array of Shenmu Wangding was activated.

  The outer layer of the cinnabar furnace emitted a steady stream of dark golden light that flowed and circulated, emitting a warm heat.

  Zhang Ye's palm pressed against the dan furnace, more intuitive, controlling the rhythm and flow of the infused mana. The rhythm and flow of the incoming mana also directly represented the size and rhythm of the four yang fires in the dan furnace. This operation was equivalent to controlling the rhythm of mana during combat.

  Half a time unit had passed, and Zhang Ye followed the steps, adding a total of seven medicinal materials.

  The young man had been simmering down previously, but this time he injected his magic wildly and launched a burst of explosive attacks on the medicinal materials.

  Another quarter of an hour passed, and Zhang Ye was already drenched in sweat, his true energy consumption being quite severe, with faint signs of decline beginning to show.

  Zhang Ye once again took control of the rhythm, entering a slow simmer while adding in the last six medicinal herbs.

  Time slowly passed, and Zhang Ye's true energy was almost exhausted. However, the elixir still hadn't taken shape. At this final critical moment, when the impurities, evil energy, and toxins were being driven out, it was necessary to use the strongest state of the Four Yang Fire to succeed.

  But Zhang Ye was almost exhausted and on the verge of defeat. At this moment, the golden bud in the field suddenly shook its waist, Gu Du -

  The little guy emitted a golden light ring. The Divine Wooden King Ding absorbed the light ring, and the temperature slowly dropped.

  When Zhang Ye fell to the ground, Shenmu Wangding also returned to calmness. However, unexpectedly, a wisp of medicinal fragrance was emitted from the six small holes on top of the Dan furnace. This fragrance only needed to be smelled, and it would make one's spirit lift slightly.

  "This time I'm rich." Zhang Ye muttered to himself before falling into a deep sleep.