Zhang Yun smiled and said, "It seems that I need to explain the basics of Dan-making to customers again. He was happy to do so and patiently explained: "The so-called secondary Dan, also known as waste Dan, but our store doesnt think so. Secondary Dan is a product of the failure of Dan-making by alchemists, which is formed when there are slight errors in the control of fire or furnace time, causing the spiritual energy of the medicine to overflow. This kind of secondary Dan contains less spiritual power, so its effect is also very small, but its better than nothing, so some Taoist friends are willing to buy a batch at a low level. Its said that some Taoist friends who have taken some secondary Dan feel that the effect is not bad after all. I dont know if youre interested?"

  "Will it produce toxicity if the elixir fails? Can it still be taken?" The man in gray asked curiously, clearly not entirely ignorant of alchemy.

  "Haha, fellow Daoist is talking about another kind of failed elixir product, thats the real waste elixir. Usually, its because of a major mistake during the refining process or the fire was too strong, causing the medicinal properties of the elixir to change, resulting in a toxic waste elixir. This waste elixir not only has no use for us cultivators but also contains a hint of toxicity, and taking it would be harmful with no benefits.

  However, fellow Daoist, please rest assured that this waste elixir is extremely easy to distinguish from the secondary elixir. Not only does its shape and color change, but it also has a strong irritating smell, completely different from the medicinal fragrance. If you take a closer look, youll know whether what I said is correct or not."

  Zhang Yun finished speaking and took out a few Clear Spirit Pills secondary elixirs to let the gray-robed man appraise them.

  The man in grey carefully observed for a moment, then sniffed forcefully in front of his nose, nodded and said: "What the shopkeeper said is indeed true, this time the cinnabar still contains a hint of spiritual power. I will follow what the shopkeeper said and exchange it for five Clear Spirit Pills and twenty secondary cinnabars." After saying this, the man in grey took out a deep brown, slightly translucent stone block, which was a common earth-attribute mid-grade spirit stone.

  "Take it well, fellow Taoist!" Zhang Yun divided the Qingling Pill and Cidan into two medicine bottles and handed them over to the man in gray.

  After the man in gray clothes walked away, Zhang Yun revealed a mysterious smile and said to the shop assistant with pride: "Hehe, another fool has been fooled! Although its true that eating secondary dan is harmless, its spiritual power is too weak. Even if you eat twenty pills, its meaningless, its simply a waste of spirit stones. However, since he can take out mid-grade spirit stones, wasting a few low-grade spirit stones doesnt matter, haha! How about it, didnt I say so? Last time, I bought a bunch of secondary dan from the cloud familys alchemist at a low price, and selling some occasionally has earned me a lot of spirit stones!"

  That twenty-year-old fellow nodded repeatedly after hearing Zhang Yuns words, flattering: "Yes, you are the famous Dan Dao Dazongshi of our Liuyun Fang City. What you say, who dares not to believe? Even if this fool ate a dan and thought it was useless, I estimate he wouldnt dare to attribute the reason to you. Alas, if I could learn half of your skills, where would I still worry about mixing in the Immortal Realm?"

  But in the following months, there were always people coming to buy the secondary dan, and even a middle-aged monk with a black hat and a bamboo hat came once and spent 30 spiritual stones to buy more than 100 grains of Qingling Pill secondary dan. This made Zhang Yun somewhat puzzled, could it be that this secondary dan really had some effect? He even personally took more than a dozen Qingling Pill secondary dans in succession, but did not feel any effect, and wondered what the hell those fools were buying so many secondary dans for.

  The stupid guy in gray clothes that Zhang Yun mentioned was naturally Zhao Di, anyway he didnt lack spirit stones, buying some second-rate elixirs to try out wouldnt hurt either.

  Before taking the Qingling Pill, Zhao Digu made a sudden move and put one of them into the Qiankun Small Cauldron, then swallowed another Qingling Pill.

  A refreshing spiritual energy emanated from his abdomen, slowly spreading throughout his body along the meridians. Zhao Di followed the fifth layer of the "Chasing Wave Technique" to control a strand of spiritual energy circulating through various meridians in his body, finally slowly guiding it into his dantian... Repeating this process again and again, refining the spiritual energy from the Clear Spirit Pill bit by bit, until after one night, Zhao Di had thoroughly refined the Clear Spirit Pill.

  Before taking the next Clear Spirit Pill, Zhao Di didnt forget to take a look at the elixir in the small cauldron. As a result, what made him ecstatic again was that the elixir in the cauldron had undergone an extremely obvious change, not only had its spiritual energy increased several times, but it had also become semi-transparent and emitted a rich medicinal fragrance.

  Zhao Di Lings machine moved again, and he experimented with a few more Qingling pills and several more Cidan.

  Through his repeated experiments, it was found that Xiaoding can increase the spiritual power of Qingling Pill to six or seven times its original level, requiring two days and nights. Xiaoding can also upgrade the secondary dan of Qingling Pill to a level slightly inferior to ordinary Qingling Pill, which only takes one day, but cannot be further upgraded.

  These two kinds of elixirs, after being refined by Xiao Ding, Zhao Di did not dare to take immediately, who can guarantee that there will be no side effects? He managed to get a few wild rabbits, crushed the elixir powder that had been refined by Xiao Ding, took out a bit of powder and fed these rabbits, carefully observing whether there were any adverse reactions.

  As a result, apart from seeing the rabbit become more spirited and active, no adverse reactions were observed.

  Then Zhao Di began to cultivate and take Dan medicine with a small cauldron at ease.

  From then on, at the beginning of each month when the Flowing Clouds City was most bustling, there would always be an unremarkable monk wearing a black hooded cloak who would buy a few Clear Spirit Pills from various medicine shops, and occasionally also purchase a batch of secondary dan. Because monks dressed like this were too common, and the things they bought were all very ordinary, no one paid extra attention.

  Not long after, the monk began to buy a better pill than Qingling Pill, which is called Xiwu Dan. This pill not only enhances the cultivation of monks above the 9th layer of the Refining Qi period but also has a certain effect on washing the marrow and transforming the tendons, removing impurities from the body, and improving the qualifications of monks in the Refining Qi period. The price is as high as 60-70 spirit stones per grain, and very few are sold, not every month there is such a pill for sale. Each time, the hooded monk can only buy two or three grains.

  Not only elixirs, but also the targets of the Doupeng cultivators include various magical instruments, classics, talismans, blank talisman papers and other items. Each time they buy a small amount, about two or three hundred spirit stones, but the total amount of spirit stones spent is astonishing. There are nearly eighty Doupeng cultivators in the market who wear black hoods, with cultivation levels ranging from the third layer of Qi Refining to the thirteenth layer, and no one can pick out Zhaos region mixed among them.

  Such stories happened again and again in Yunyunfang City, year after year. Yunyunfang City welcomed more and more newcomers, and witnessed batch after batch of cultivators growing their cultivation, becoming a member of the immortal world.

  Zhao Di, who had not set up a stall to sell talismans for a long time, had already been forgotten by the crowd. After all, low-ranking talisman makers like him were never in short supply in the Flowing Clouds Market.

  The only one who still remembered Zhao Di was probably Yun Lao Tou from the Cloud Immortal Abode. Five years later, on a certain day, Yun Lao Tou came to the building where Zhao Di lived, reminding himself that the rental period had expired. He found that the seal of the building was in an activated state, making it impossible to know what was inside. After transmitting his voice into the building for a long time without getting any response, Yun Lao Tou was forced to use a spare spell plate to close the seal and enter the building. Only then did he discover that this place had been empty for a long time, with only broken talismans scattered all over the ground, and there was no sign of Zhao Di anywhere.

  Its not uncommon for low-level cultivators like this to go missing without a word, it happens almost every month in the Flowing Clouds City. The vast majority of them never reappear in the cultivation world again. It can be imagined that in all likelihood, they have already met with a tragic end and lost their lives.

  Yun Lao Tou obviously also took Zhao Di as this type, and let out a slight sigh before leaving the building.

  It wasnt long before this building had a new occupant, and soon the old man in the clouds also forgot about his previous tenant.

  (Vote for recommendation, collect this book! By the way, ask for a deputy in the comment area and be responsible for the essence!)