After sitting in the restaurant, Chunyu Zhen poured a large mouthful of strong wine called "Sweat and Blood". The wine juice overflowed and spilled on his clothes. He stared at Zhao Xingde with a swollen eyes and said, "Do you think I lost all my property by buying and selling coupons?"

"Why?" Zhao Xingde said lightly, filling Chunyu Zhen with the wine bowl in front of him. Those who want to die must have a tumultuous heart in their hearts. When he finished venting, he might not want to die. Li Ruoxue sat quietly beside him. After she found that Chunyu Zhen had extremely strong self-esteem, she no longer looked at him with pity. "Scholars can be killed but not humiliated." Li Ruoxue also felt that he should persuade him, and there were fewer and fewer real "scholars" in this world.

"Did you see the reward list of the Ordnance Department?" Chunyu Zhen said in a hoarse voice.

"See it." Zhao Xingde nodded. He guessed what was going on, and couldn't help but secretly sympathize with Chunyu Zhen in his heart.

"I found that using a method to cast a cannon can greatly reduce the weight of the cannon and increase the chance of successful casting." Chunyu Zhen said slowly. He took a sip of wine and sighed, "But it cannot be completely successful. The things cast either have cracks or holes. Once the gunpowder is used vigorously, it will explode. They are all inferior." He took another sip of wine. This is the habit of blacksmiths in front of the stove. Some blacksmiths like to spray a sip on the forged sword after drinking, and watched the blue flames rise. However, Chunyu Zhen despised this boring behavior.

"Then how are you going to cast a cannon?" Zhao Xingde asked slowly. He wanted Chunyu Zhen to speak as much as possible and spread the depression in his heart.

Chunyu Zhen was stunned. Every blacksmith had his own secret, especially the art of casting a cannon that was related to the golden reward. How could Zhao De ask so lightly in the restaurant? He was stunned for a while, and suddenly laughed again: "I am really trapped in a demon. This cannon cannot be cast. The property accumulated by the four generations of the Chunyu family has been ruined. I am still holding it in such a art of casting a cannon that kills people. What are I doing like a treasure?"

He sighed, let go of his mind, and cherished the art of casting the cannon, which was never successful once, slowly said: "Casting cannons uses mud molds and wooden molds. After casting the cannon, they break the molds, making the molds remade each time, and the molds are slightly different every time, making the bronze cannons different every time, and the quality is uneven. I thought that by changing to an iron mold, you can cast multiple cannons in one pair of molds, and the size and styles of the cannons are the same, which is even less likely to fail." At this point, he drank a big mouthful of wine and coughed several times. He was very proud of his idea at the beginning.

Zhao Xingde was slightly surprised. The art of casting in artillery that Chunyu Zhen mentioned evoked some memories that he had been sealed for a long time. If what he said was serious, Chunyu Zhen could be regarded as a pioneer in artillery casting in artillery.

After Chunyu Zhen poured the strong wine, his eyes were a little dazed, and he continued to murmur: "I tried to cast a few copper cannons. After the failure, I smashed the cannons to pieces. I carefully examined the cracks and pores inside and found that the reason why it was not successful was because copper water was poured in. The outside condensed first, fixed the outer circle of the cannon, and the inside was cold, and I tried hard to pull it in, so the cracks and gaps were pulled out. So I thought, if cold water was poured into the mold of the cannon, the inner wall of the copper cannon was cold first and the outer wall was cold, so that the inside was already hard, and the outside had to squeeze in," he raised his head and grinned at Zhao Xingde and smiled, "You don't know that when the iron and copper water was cold, it was less likely to cause bad things than pulling. Sometimes it could make things better."

Zhao Xingde also fell into deep thought, his eyes wandered a little, and he slowly whispered: "I know."

Chunyu shook his eyes and turned into disbelief, then he turned into despair, and said, "At that time, I had failed to cast several cannons. The ancestral blacksmith shop was no longer able to make ends meet. Since I discovered the secret to the successful casting of cannons, I naturally refused to give up. So I mortgaged the shop to someone else, raised enough money, and continued to try casting."

"Did you really try casting?" A trace of excitement flashed in Zhao Xingde's eyes. Chunyu Zhen's secret evoked memories that he thought he would never touch again. The seemingly ordinary person in front of him was actually a real genius. He allowed an extremely advanced casting technique to come to the world more than 800 years in advance, but he himself was so depressed that he wanted to commit suicide because of his dashing talent.

"Try it." Chunyu Zhen sighed and said, "It still failed. After today, my ancestral blacksmith shop will also be given to others. Tomorrow I have no face to see my ancestors underground, so it would be better to break it today."

"No way?" Zhao Xingde seemed to have not heard Chunyu Zhen commit suicide, frowned and thought, and murmured, "You are using copper water, which is better castable than pig iron. Is there a problem with the formula of copper water?" He put his right hand on the table, and his finger subconsciously drew it on the table, and his left hand also subconsciously took it up, as if he was pressing something.

Although Chunyu Zhen wanted to commit suicide, he did not allow others to slander his skills at will. He said with a red neck: "There will be no problem with copper water. My father came from the Ordnance Department. Although he cannot say that all the skills are penetrated, he is in charge of the copper water ingredients." In order to keep it confidential, the Ordnance Department did not allow a craftsman to be responsible for the entire casting process. Chunyu Zhen felt a little regretful. It was because he did not understand the other cannon casting processes of the Ordnance Department that he simply took a different approach and took the lead in using two methods of iron mold casting and center water injection condensation.

"If there is no problem with the copper water formula, then the problem may still lie in the cooling temperature." Zhao Xingde paused and said, "Or, there is a problem with the combination of temperature and formula." He felt that it was not clear enough and continued, "I mean, the cooling temperature control of the inner and outer walls of the casting mold is not accurate enough." As he said, he reached out to dip a drop of wine, his wrist was condensed, and his elbows were slightly pulled, and a straight horizontal line was drawn. Then he dripped the wine and outlined it up and down a few strokes, drawing the mold, gun body, and water injection device described by Chunyu Zhen according to his guess.

Chunyu Zhen's eyes wide open. One was that Zhao Xingde's paintings were so skillful that he was surprised. Two was that he just described a rough idea. Zhao Xingde dissected the structure on the spot, which was similar to what he actually created, and even the structure was simpler and clearer. Li Ruoxue also looked at Zhao Xingde in surprise. She never knew that Yuan Zhi was good at painting, but he created a French style of rules and ink.

"The original copper water material formula of the Ordnance Department must be the formula with wooden molds and mud molds to cool it, and the most likely to succeed in casting. If you don't use cold water and iron molds to cool it, you might be able to successfully casting it." Zhao Xingde suddenly remembered something, paused, and said in a deep voice.

After hearing this, Chunyu Zhen was stunned, as if his mind was being taken away. After a long time, he took a heavy shot of the wine case and sighed: "Why didn't I think of this?" He was silent for a while, only to feel that his heart was hollow and that what he had done for all his family wealth was just a joke. He calmed down, but his face was a little sad, "But if he used a clay mold and a wooden mold, it would be impossible to beat the Ordnance Department."

He respectfully bowed to Zhao Xingde, "Sir, it's a master. Although he lost all his money, he was also grateful for his teachings." After that, he wanted to get up and leave. Although he lost his family property, he still had his skills. It was not a problem to find a blacksmith shop to be a craftsman, and it was not a problem to support his family. Didn't the family property that his ancestors saved back then? Thinking of this, Chunyu Zhen secretly scolded himself for being confused for a moment, and was even more grateful to Zhao Xingde for saving his life.

"Mr. Chunyu, please wait," Zhao Xingde said slowly, "I have something to ask for advice."

Chunyu Zhen had just received his guidance, so he naturally could not push it away at this time. He sat down and bowed and said, "Sir, please speak, I will tell you everything I know." At this time, even if Zhao Xingde asked him about his ancestral secrets, he would not hide it.

Zhao Xingde thought for a moment, pressed his hands on the table, leaned forward, approached Chunyu Zhen, and whispered: "The art of casting cannons is a major military and national event. Isn't Mr. Chunyu afraid that every man is innocent and guilty of possessing a treasure?"
Chapter completed!