The next day, Mr. Jiang invited merchants of all sizes in Jianghuai City, and Mr. Jiang introduced Lin Yi and her project to everyone.

Because Master Jiang has a high reputation in Jianghuai City, with his strong recommendation, coupled with the favorable conditions given by Lin Yi, the negotiation on the second day was very smooth, and most of the merchants attending the meeting reached an agreement with Lin Yi.

After that, Lin Yi left Jianghuai City and went to the next city, before leaving, Master Jiang also wrote a letter of worship to Lin Yi, because there was a letter of worship from Master Jiang, and Jianghuai City was used as a sample, and the later cities talked very smoothly.

In less than ten days, Lin Yi visited three cities, and after that, Lin Yi rushed back, and it took almost five days to rush back to Qingnan City.

Back in Qingnan City, Lin Yi first went to the Zhao family's blacksmith shop, and when he walked to the front of the shop, Lin Yi saw that the furnace next to the house had been improved, and the left and right sides were half waists, and the openings were opened, and a pipe was connected to the outside, which looked like two horns.

Under the furnace, the fire was burning, but there was no one in front of the furnace, Lin Yi was about to call Eleven to enter the house to take a look, but saw the hidden door open, Li Yu walked out of the inner room with bare arms, and he was still holding an iron rod in his hand.

When Li Yu saw Lin Yi, he was overjoyed, and a happy smile appeared on his face: "Dongjia, you're back!" ”

Lin Yi nodded and said with a smile: "Yes, how is the iron refined?" ”

Li Yudao: "The toughness is much better than before, and I am planning to practice this iron rod again, and then test its toughness." ”

Lin Yi said: "Okay." I'm waiting here. ”

Li Yu nodded, stepped forward with an iron rod, put the iron rod in the furnace below and burned it for a while, then took it out for a while, and finally put it into the water, emitting a sizzling white smoke.

Waiting for the iron rod to cool down, Li Yu came over with it and said, "Owner, it's already good, we can test it now." “

Lin Yi nodded, turned his head to Tao Eleven, and said, "Eleven, you go and help." ”

So Tao Shiyi went over, took the iron rod from Li Yu, and then took it and cut it off, while Li Yu went into the house to bring out the test equipment.

Together, clamp the iron bar on both sides and start shaking the handles on both sides.

The two sides were divided wider and wider, and the iron bars were pulled thinner and thinner.

Peach Twelve, who was standing on the side, saw that the iron bar that was originally so short was pulled longer and longer like a noodle, and the whole person was stunned, and looked at it with wide eyes, and his heart was in his throat, for fear that he would use too much force in the middle and tear off the iron bar.

Tao Shiyi and Li Yu, who were in charge of shaking the handle, were also full of nervousness, for fear that they would accidentally tear off the iron bar, because of nervousness, both of them were sweating, and the clothes they wore inside were soaked with sweat.

"Stop!" Lin Yi counted the number of laps that the two of them shaken, and when they reached the qualified number, she shouted to stop.

Li Yu and Tao Shiyi hurriedly let go of the handle, greatly relieved, and the two of them subconsciously stretched out their sleeves to wipe a handful of sweat, and then glanced at each other.

Peach Twelve also let out a long sigh, and said with a look of surprise: "I never imagined that such a hard iron could be pulled for so long." ”

The happiest person is Li Yu, he smiled and said, "Owner, is this iron rod qualified?" ”

Lin Yi said with a smile: "The toughness is qualified, and the hardness and carbon content will be tested next." ”