After coming out of the Tianxia Auction House, Nangong Yu had less than five million gold left on him. A billionaire has become a millionaire. In this regard, Nangong Yu just lamented that martial arts was burning money, but he didn't feel the slightest bit disappointed in his heart. Anyway, after you practice this martial art yourself, you can sell it. Besides, with the formation stone as a treasure trove, making money is not a piece of cake. With the martial arts skills solved, the last problem left is to purchase information on elixir identification. The reason why Nangong Yu did not buy the information on elixir identification at the Tianxia Auction House is because since Nangong Yu has become a direct descendant of the Zhao family, how could a direct descendant of the Zhao family not have such information on elixir identification. Therefore, it cannot be purchased at the Tianxia Auction House. However, the number of people in the profession of alchemist is even smaller than that of illusionist, so there is naturally very little information on elixir identification. Nangong Yu visited almost all the big shops in Tianxucheng and finally bought a tasting book "Alchemy Appraisal". When I returned to the inn with the Book of Appreciation of Alchemy, it was already a quarter past midnight, and it was already late at night. Nangong Yu didn¡¯t feel tired at all, and immediately flipped through the "Alchemy Appraisal". Although Nangong Yu has nothing to spend money on now, Nangong Yu is going back to Wuyang Town. In that small place of Wuyang Town, high-end elixirs are almost extinct, and elixirs are even rarer. Therefore, Nangong Yu must raise the essence of elixirs. . Once the cells in his body absorb the elixir essence remaining in his body, Nangong Yu has a reserve of elixir essence to continue practicing. The second thing is that when I go home, I naturally bring some elixirs home. Wuyang Town¡¯s hometown is behind Nangong Yu. With the rear being stabilized, Nangong Yu had no worries when fighting outside. The "Alchemy Appraisal Record" records the identification methods of hundreds of kinds of elixirs. Nangong Yu spent half an hour browsing through them. Nangong Yu finally understood that the elixir purified from the seven-leaf elixir before was The essence of medicine, why is it also the best elixir? ¡°The elixirs of the world all lead to the same destination by different routes. The elixir grows in places with abundant spiritual energy and absorbs the essence of the sun, earth, and moon. The more essence accumulated in the elixir, the higher the level of the elixir. Therefore, the difference between the first-level elixir and the ninth-level elixir lies in the amount of essence accumulated inside. Therefore, whether it is a seventh-level elixir or an eighth-level elixir, the essence of the elixir purified from the formation stone is the same, it is just a matter of more and less. Therefore, the seventh-level elixir essence purified from the array stone is naturally a top-quality elixir. ??The level of elixirs mainly depends on the purity of the elixirs. ??Elixirs are refined and processed by alchemists from elixirs. For ordinary elixirs, the first grade is the lowest and the tenth grade is the peak. The reason why first-grade elixirs are inferior is that they contain many impurities, less medicinal essence, and low purity. The fewer impurities in the elixir, the higher the purity of the medicinal essence, and the higher the level of the elixir. As for the difference between ordinary elixirs and top-quality elixirs, it also lies in the difference in purity. The purity of top-quality elixirs is close to perfect. As for the levels of top-quality elixirs, this depends on the various effects of top-quality elixirs. For example, the essence of the elixir purified from the formation stone can only be used for cultivation to nourish the body. It is considered a first-class elixir. However, Tianwu Dan, as a third-level top-grade elixir, can allow a person with no foundation to advance to the Tiangang realm. After knowing the level relationship between the elixir and the elixir, Nangong Yu closed the "Alchemy Appraisal Record". The identification methods of these elixirs are different, but the purpose is the same, to identify the purity of the elixir to determine its grade. Nangong Yu bought "Alchemy Appraisal Record" not because he wanted to truly become a master of elixir appraisal, but just to clarify the doubts in his heart. Now that the doubts have been solved, there is no need for the "Alchemy Appraisal Record". As for the issue that the purified elixir essence is the best elixir, it is simple, just add some impurities to lower the level of the elixir. In the entire Great Qin Dynasty and the entire Eastern Continent, Nangong Yu is probably the only one who dares to do this. Tianxu City is a gathering place for caravans, and many shops are open day and night. Nangong Yu seized the time to raise the elixir. With a capital of less than five million gold, Nangong Yu worked from Zi Shi to Mao Shi and gained a lot. The elixir essence in the space ring occupies half a bucket of space. There will be no need to worry about the elixir essence after half a year. Next is the amount of gold tickets, which has increased to 48 million gold. As for the elixir, it fills up all the remaining space in the space ring. The lowest level of these elixirs is level eight, and most are level nine or ten. The secret of the Formation Stone cannot be told to any other person, not even to family members, Nangong Yu will not tell it. Taking out the essence of the elixir would make them suspicious, so Nangong Yu prepared the elixir for them. There is still one hour and two quarters.It was time for the Desert Eagle caravan to set off. Nangong Yu took out two martial arts books on Breath Condensation Technique and Six Yang Blade, browsed through the two martial arts books as quickly as possible, and then started to memorize them by rote. Nangong Yu wants to start practicing while the caravan is marching, so he cannot use his martial arts skills frequently. Otherwise, there will be hidden dangers once someone sees it. Nangong Yu didn't want to be targeted and killed immediately when he left the caravan. An hour passed quickly. Nangong Yu¡¯s memory was very good and he basically memorized both martial arts books. Putting the martial arts into the space ring, Nangong Yu checked out of the room and came to the place where the Desert Eagle caravan set out. The Desert Eagle caravan traveled between several dynasties, and the business was huge. The caravan's fleet was also unusually large, with two hundred carts of goods, and seventy or eighty warriors employed, all of whom were at the Tiangang realm. The leader of the escort team was actually a strong man in the Purple Gang Realm. You can imagine the value of this batch of goods. Seventy or eighty Tiangang Realm warriors plus one Purple Gang Realm strongman, this kind of lineup will make the average Xiao Xiao immediately feel frightened. Even a capable thief must be prepared to pay a heavy price if he wants to take over the convoy. Of course, there is also the endless revenge from the caravans. With the help of his brand, Nangong Yu successfully joined the caravan and was arranged in a large carriage. In this carriage, there were four other people who, like Nangong Yu, paid high commissions to hire caravan protection, three men and one woman, all of whom were in the Earth Gang Realm. The four of them were dressed in extremely bright and colorful clothes, and they must be the children of some great noble. When the four of them saw Nangong Yu coming in, they were just stunned for a moment, then ignored him, and the four of them chatted with each other. Nangong Yu had no interest in joining them. He sat down cross-legged and began to practice the Turtle Breathing Technique. After a while, the car body shook and shook slightly, and the caravan set off.