Cheng Hong also knows that this pair of people in the palace are clear, and they are still bent on death, whether they are made or killed, they are not something that they can manage with a small shrimp, it is better to go home and do something capable, such as making some soap, just put it in the perfume shop to sell, and when the time comes, count the money until the hand cramps and sleep until you wake up naturally, Meidi is very, Meidi is very!

Back home, Cheng Yanjin was already waiting at the door, Cheng Hong hurriedly greeted him, Cheng Yanjin said: "Huailiang has already told me about today's things!" I'm doing a good job, but don't go after it! The involvement is too big, since he dares to calculate, all the important ministers of the court must have a back hand and are not afraid of retaliation, my son does not check now, all the wind and rain will be blocked by the ministers of the court and the central government! ”

Cheng Hong nodded: "Thank you Aya for your teachings!" Cheng Yanjin nodded: "Hurry up and go back to sleep, Cheng An came here today, said that the steel mill was about to be built, and said that you should go!" Cheng Hong gave up his hand and retired and went back to his small courtyard......

The next day, Cheng Hong got up early, washed up and took Erya to prepare to go to the steel mill, it is estimated that some of them are busy today!

All the way to the steel mill, now here has been a big change, a city wall along the cliff of the valley hugging the entire steel mill, a cement road of more than 200 meters connects the wharf and the gate of the steel mill, next to a fork road straight to the cement plant, these two are the earliest cement roads in the Tang Dynasty, although not as smooth as modern technology, but it is not a dirt road that runs all the way to smoke and dust can be compared.

Turning over and dismounting into the factory, the blast furnace open-hearth stands on the riverbank, and the tall iron leaf waterwheel "slams and la" with the flow of the water, moving and still pleasing to the eye! A group of second-generation officials have arrived, and this time not only the eldest son but also the second son came.

A group of people expressed their gratitude when they saw Cheng Hong coming, and they were grateful, and the second sons of that group had never been here, and they all looked at everything fresh, stretching their necks and looking inside.

Here, Cheng Hong greeted Erya and went straight to the blast furnace with Erya in his arms, where the iron ore and coke were ready, and all kinds of linkage devices began to supply air as soon as the preheating furnace was ignited! Cheng Hong looked at it and nodded, in the end, there are master craftsmen involved, this is much more convenient than when you were in Yunzhou, as long as you explain the general principle, this group of people can make it for you, and they can draw inferences, but it is not comparable to the group of two-five-eyed carpenters in Cheng Hong's house!

Cheng Hong was about to order the ignition when a voice came from afar: "His Royal Highness the Crown Prince has arrived!" King Wei, King Shu has arrived! When everyone heard this, they hurriedly went out to greet them, if they didn't shout out, they would definitely belong to a private party, how to come at ease, and they would definitely be officially greeted when they shouted out.

A group of people "hulala" went out to greet them, and greeted him, and His Royal Highness the Crown Prince waved his hand: "No courtesy!" Let's go inside! ”

After a group of people came in, Cheng Hong ran to the prince's side: "Your Highness! Order the fire! Li Chengqian nodded: "Ignition!" At this time, there were already craftsmen preparing on the side, the preheating furnace was ignited in turn, the blast furnace was ignited, the pressure rod was pressed, and the huge water wheel "squeaked!" "A roar drove the blower and a series of linkage equipment! At this time, someone was already ready, and they were all Cheng Hong's set in Yunzhou City: "The No. 1 furnace and No. 1 forging hammer are normal!" "Hammer No. 2 is normal!" ...... "The grinding wheel is normal!" "Everything works!"

A group of people looked at the huge forging hammer of "Bang Bang Bang Dang" and were surprised!

At this time, before the iron came out, a group of people looked at the smoke of the blast furnace outside and chatted together, Li Chengqian said: "Cheng Hong, what is the road outside?" Cheng Hong said: "That's the cement road!" In the future, let the grassland captives repair the road is that thing! Li Chengqian shook his head: "Although it's a good thing, I'm afraid it won't work, it's too much for the horse to run on it!" Cheng Hong was surprised: "Can't nail the horseshoe?" Li Chengqian looked confused: "What is a horseshoe?"

Cheng Hong looked at Li Chengqian, it didn't look like he was pretending, so he walked up to the horse's head and raised one of the horse's hooves: "That's it!" It's good to replace it if it's broken after nailing! Li Chengqian looked curious, and Cheng Hong pulled him: "Don't be curious, after a while, the iron will be made into steel, and you will be able to hit a few nails on it, and you can try it yourself!"

Time passed minute by minute, and finally came to the moment of tapping, (blast furnace ironmaking, open-hearth steelmaking), the craftsman hooked out the iron mouth, the molten iron flowed directly into the open-hearth crucible through a graphite groove, someone next to him scraped the molten iron in the trench with a long-handled shovel, immediately closed the door after scraping, and the mountain of iron ore was hoisted onto the furnace platform one by one, poured into the blast furnace, and the coke was put in by another packing port, and the slag was added to the coagulated slag in an orderly manner......

After the open-hearth fire was opened, all kinds of things began to be added to it, and the carbon ratio was added according to a certain ratio, only waiting for the steel to be produced after stirring, Cheng Hong asked people to cut off some soft iron materials on the side, poured dozens of horseshoes on the side, and asked the craftsman to forge them with a forging hammer to prepare to nail Li Chengqian's horse with a horseshoe first.

After a while, Li Chengqian's horse was hung up and nailed and put down, and the horse stepped on the horseshoe "trampling" sound, at first it was a little uncomfortable, and after a while it began to be normal, "trampling" walked around, Li Chengqian signaled, and Zhang Yuanli, the head of the guard next to him, turned over and rode away......

At this time, the craftsman next to him began to shout: "The iron is out!" , A group of strong men took the hopper and began to connect the molten steel, next to it was a big horizontal knife, a Mo knife mold, and the kind of plate armor and scale armor mold invented by Cheng Hong!

A group of people carry the hopper to run, here small to the arrow to the Mo knife a full set of weapon molds have been poured all the way down, next to someone specially with an iron car to clamp up the hot billet and transport it to the forging hammer, craftsmen pedal control lever to control the forging hammer up and down, knock the blank, after the beating put to the side, someone with a small hammer to refine, and then heat and quench, sent to the grinding wheel "buzzing", a knife is finished.

Everyone was amazed, how could it be built like this? Cheng Hong took the first horizontal knife and handed it to Li Chengqian, Li Chengqian asked the guards to pull out the horizontal knives on their waists and slash at each other, and there were injuries in a "click" sound, the knife in the prince's hand here had a gap the size of a grain of rice, and the smallest gap of the guards there was also the size of a soybean. Cheng Hong looked at it, "It shouldn't be!" So Cheng Hong picked up the freshly beaten steel knife and sawed it on the wood, looking at it and nodding: "That's the case!" Li Chengqian asked, "What's the matter?" Cheng Hongda: "After this knife is opened, because it is a grinding wheel blade, it is a little empty, so it is best to use fine sand and stone to grind it!"

At this time, Zhang Yuanli rode back on horseback: "His Royal Highness the Prince, after nailing the horseshoe, this horse will not hurt the horse's hooves whether it is on the cement road or on the pebble gravel, and the grip is strong, and the soybeans and the like are not slippery at all when laid on the ground, and it is estimated that it can be as smooth as it is on the ice and snow!" Li Chengqian nodded.

At this time, the knives and armor over there have been built endlessly, and a group of people here have already calculated the amount of steel produced by the steel mill, and a group of people are arguing there, and finally Li Tai came over with the results: "Brother Huang, it's been calculated, this pair of furnaces produces 780,000 catties of steel per day."

Li Chengqian was dumbfounded when he heard this: "Is it right?" Li Tai nodded: "Forget it four times, it's just a lot, it's just that there is a biggest problem now!" It's just that the ore doesn't seem to be enough! It is expected that these ores will be enough for more than a month! Li Chengqian hurriedly wrote a good note, explained the matter here clearly, and handed it to Zhang Yuanli, Zhang Yuanli didn't say a word, and after saluting, he quickly went straight to Chang'an City......