At first, when Tang San was at the Tang Sect, he was specifically in charge of manufacturing hidden weapons. Before he jumped off the cliff, he had already reached the level of Outer Sect Master and was extremely familiar with the Tang Sect's hidden weapon manufacturing process. The Tang Sect's entire economy almost entirely relied on the outer sect's production of poison and hidden weapons. After careful consideration, Tang San decided to bring this method to the Douluo Continent. Although there were some difficulties, it could still be tried out simply at first.

  So Tang San decided to take advantage of today's holiday to find a blacksmith shop for cooperation.

  Entering the Soul Master realm, as long as he goes to the Wu Soul Hall next month to receive his allowance and retakes the level test, Tang San will have an income of 100 gold soul coins per month. As a low-level profession, blacksmithing is also very cheap to hire, and he believes he can still support himself. Moreover, the production cost of all hidden weapons is shared by everyone, so money is not a problem.

  He had made up his mind to find a blacksmith to cooperate with in manufacturing mechanical hidden weapons, and it was also because Tang San decided to make several more powerful hidden weapons. After all, this world was different from the previous one, and all materials needed to be collected by himself. Making more powerful hidden weapons naturally required more time and effort.

  Of course, the craftsmanship of making Tangmen hidden weapons was something that Tang San would definitely not pass on to others. He only needed to package the work of manufacturing hidden weapon parts to the blacksmith shop and do the final assembly himself to keep it confidential. Not to mention that the people in the blacksmith shop couldn't even imitate, they wouldn't even be able to know what the final product Tang San was making.

  After inquiring several passersby, Tang San finally found the destination of this trip. The largest blacksmith shop in Soto City, this blacksmith shop had a very simple name, just called Blacksmith Shop, without any decorative words.

  Not yet entered the blacksmith's shop, already can hear dense knocking sound, voice dense crisp. Apparently there are many blacksmiths at work.

  From the outside, this blacksmith shop is much larger than the one Tang San used to work at in Noding City. It's about five or six times bigger than the Stone Three Blacksmith Shop. The spacious reception hall has various finished products on display, categorized into three main areas: daily utensils, weapons, and defensive gear.

  Among them, daily necessities occupied about half of the store's area. The remaining ones were weapons and defensive equipment. In the front hall and back workroom of the store, a long black canopy was used to separate the central area, with a white iron word every three meters, which looked very majestic.

  There are six or seven clerks in the store's living room who are responsible for receiving guests and seeing them off. The division of labor is very clear. Some are responsible for receiving customers and taking orders, some are responsible for delivering finished products to customers. There is also a middle-aged man with a sturdy build sitting at the counter, specifically responsible for collecting money.

  Tang San strode into the store and headed straight for the counter.

  A shop assistant hurriedly came forward, blocking Tang San. "Young master, do you need anything?" Tang San couldn't help but smile inwardly. Master was already a title, yet he added the word 'young'. Although his height was close to that of an adult, his face still looked youthful and he appeared to be a young boy who wasn't very old.

  "I'd like to discuss some business with you." Tang San said with a smile.

  The fellow looked Tang San up and down several times. Tang San's attire was very simple, with a linen shirt and pants. There wasn't anything special about him. His appearance was ordinary. His figure was well-proportioned. He looked like an ordinary person.

  "Just tell me what you want to build."

  Tang San said, "You probably can't make the decision, this is a long-term business, if possible, we will cooperate for a long time." While speaking, Tang San took out a piece of paper from his pocket, "Can you understand this?"

  That was a design drawing of hidden weapon parts. When Tang San himself made hidden weapons, he also needed to draw first, and only after careful measurement and calculation could he make them. Not everything can be relied on by memory alone.

  The fellow took over the drawings and looked at them for a moment before he was stunned. There were many complex patterns drawn on the drawings, let alone understand what they meant, he couldn't even see what these things were.

  "This..." The fellow looked at Tang San once again, then said: "Trouble you to wait a moment. I'll ask the shopkeeper. Let's see if we can do it." After finishing speaking, he immediately ran towards the counter.

  The robust middle-aged man behind the counter quickly took the drawings handed over by his partner. After a moment, his face was already filled with surprise and he said a few words to his partner before walking out from behind the counter, led by his partner, to stand in front of Tang San.

  "Hey kid, is this the blueprint you brought? I have no idea what these things are for. Can you explain?"

  Tang San said: "You don't need to know what these are, I just want to ask if you can do it. It needs to be made with top-grade refined iron, preferably with iron essence."

  The middle-aged man frowned, "I am the boss of this ironwork shop. My name is Tie Xin. Young man, do you know the price of refined iron? Adding the manufacturing cost, it's not a small sum, you'd better ask your parents to come and discuss it."

  Tang San's heart suddenly stirred, and from the middle-aged man in front of him, he sensed a fluctuation of soul power. Could this blacksmith shop owner actually be a Soul Master?

  "I'm familiar with the price of Iron Essence, to be honest, I'm a blacksmith myself. However, I'm just one person and can't possibly produce so much on my own, which is why I came to you. The price of Iron Essence, by weight, is 10 Gold Souls per kilogram, right? With your scale of operations, I think you should be able to refine Iron Essence."

  The middle-aged man nodded and said, "You're right about the price. But you should also know that the toughness of iron essence far surpasses ordinary refined iron, so it's naturally much more difficult to forge. The processing fee for using it to forge any item is equivalent to the price of the iron essence itself. In other words, for every kilogram of iron essence used to forge something, we charge a processing fee of ten gold soul coins. And this item on your blueprint is so complex that we'll have to add an additional fifty percent."

  If an ordinary person were here, they would be shocked to hear the blacksmith's shop measuring the price of something in Golden Soul Coins. But Tang San knew that the price quoted by the boss, Tie Xin, was already very reasonable. His goodwill suddenly increased greatly.

  "Uncle, the price you quoted is fine. If I were to ask for a larger quantity of production, would there be any discounts?" Tang San wasn't very good at haggling, but he still wanted to try and get some necessary discounts.

  "Definitely, if you really want to use iron ingots to make these things. Even for our big clients, material costs can't be reduced, I'm not going to lose money. Labor costs I can give you a 10% discount. If you use more than ten kilograms of iron ingots, I can give you a 20% discount. The lowest is 20% off."

  Tang San nodded satisfactorily and said, "Alright then, it's settled. Please make ten copies according to the blueprint I provided. I've calculated it carefully. Each copy will require about two kilograms of iron essence. That's a total of twenty kilograms."

  Iron-hearted stared at Tang San in surprise, "You want to do so much? This is twenty kilograms of iron essence. Adding labor costs, it's five hundred gold soul coins. Even if I give you an 80% discount on labor costs, it would still be four hundred and forty gold soul coins."

  Looking at Tie Xin's expression, Tang San immediately understood that he was afraid that he wouldn't be able to come up with so much money.

  "Uncle, you're also a Soul Master, right?" Tang San suddenly said.

  Tie Xin's heart skipped a beat as he looked at Tang San with a furrowed brow.

  Tang San said: "I'd like to have a private talk with you, can I?"

  A deal worth over 400 gold souls, even for the largest blacksmith in Soto City, is absolutely a big business. To know that their annual turnover is only around 3,000 gold souls.

  Tie Xue nodded and said: "Then please follow me to the back." He led Tang San to the back.

  Through the isolated curtain, Tang San suddenly saw a surprising scene. The front hall of this ironwork shop was already very large, but the workroom behind it was even larger. As far as the eye could see, there were rows and rows of furnaces burning brightly. At least more than fifty blacksmiths were working at the same time.

  Tang San's Purple Extreme Eyes were extremely sharp, and with a simple glance at these blacksmiths, he nodded to himself in his heart. Although not every one of these blacksmiths was particularly robust, their eyes and hands were all extremely steady. Clearly, they were all veteran blacksmiths. To be able to support such a large blacksmith shop, there must be this many excellent blacksmiths present.

  Suddenly, Tang San let out a soft "hmm" and muttered to himself: "How are they also here?"

  Tie Xin stopped in his tracks, looking at Tang San with a puzzled expression. "Young man, is there something wrong?" From the bottom of his heart, Tie Xin didn't quite trust Tang San, after all he looked too young. But the blueprint that Tang San took out didn't seem like a joke. Moreover, this was a big deal worth over 400 gold soul coins, and Tie Xin didn't want to miss it because of his own momentary doubts. Although they were the largest blacksmith shop in Sosoto City, they weren't the only one.

  Following Tang San's line of sight, he noticed two young blacksmiths who were working. They looked like they were eighteen or nineteen years old, with leopard-like heads and eyes, extremely similar in appearance, and robust builds. Their dark muscles bulged like small hills. The hammers in their hands were much larger than those of other blacksmiths, yet the forging process was extremely steady, even more efficient than some middle-aged blacksmiths nearby.