Otaku Engineer in Great Tang Dynasty

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"Feiji, go get me some of these materials!"

After sending Li Gang away, Li Zexuan wrote and drew in the study for a while, then took out a list of materials and instructed Pang Feiji.

Pang Feiji didn't even look at it, so he took it and clasped his fists and said, "Yes, Lord Hou!"

After all, he turned to go out.

Li Zexuan hurriedly stopped him and instructed him with a stern look: "Keep this list for the marquis. If you lose it or are looked at, you won't be able to stand it even with your life! Do you know?"

Pang Feiji straightened his back subconsciously, and said solemnly, "Understood! Lord Marquis! This subordinate will definitely protect the secrets!"

Walking out of the other courtyard, he took out the list of materials that Li Zexuan had given him from his arms, and was immediately dumbfounded, "This! This... What does Lord Hou want these things? Is it for the New Year?"

Previously, Li Zexuan asked Li Gang to write the couplet. Although Pang Feiji was not there, he also guessed that Li Zexuan was preparing for the New Year, but what does the list have to do with the New Year?

"Forget it! It doesn't matter! I just need to find these things from Lord Hou, and make sure that this list is not seen by others!"

Pang Feiji scratched his head and couldn't figure it out, so in the end he had to put the list carefully into his arms and walked down the mountain.

After instructing Pang Feiji, Li Zexuan returned to the study and continued to work on the book.

In fact, he had already compiled some of the textbooks for the second semester of the academy a few months ago. After so many days of retreating and cultivating books, in general, the textbooks in the second volume are basically written. Now his main work is proofreading.

The house was quiet, only he and the two little maids, Han Yuxi went to Chang'an in the morning, and the rest accompanied Ye Guozhong and Mrs. Ye to visit the academy.

That's right, these people have been wandering in the academy for several days and still haven't gotten tired of it. Sometimes Li Zexuan can't understand. Isn't it just a pile of reinforced concrete buildings? Is it that attractive?

This thing is purely a matter of standing and talking without back pain. He didn't think about it. Ye Guozhong and Mrs. Ye were both born and raised in the Tang Dynasty. When they saw the tall concrete buildings, wouldn't they feel fresh? This is the same as the first time modern people see an ancient house, and it is strange that they do not think it is new.

"Bang bang bang!"

"Master Hou! The subordinates have all the things you want for you!"

After an unknown time, Pang Feiji's knock came from outside the door. Li Zexuan put down the manuscript in his hand and raised his head, "Come in!"

"Squeak", Pang Feiji came in with a sack.

Seeing this, Li Zexuan frowned and said, "You mixed everything in a sack?"

Pang Feiji hurriedly put down the sack, opened the mouth of the sack, and said, "No, no! Look, Lord Hou, it's all wrapped in small packets of paper!"

Li Zexuan nodded with satisfaction and said, "Okay! Good job! You go to the front yard to guard, Ben Hou wants to do something in the back yard, no one is allowed to come to the back yard without my order!"

Pang Feiji nodded and replied, "Yes! Lord Hou!"

Then he couldn't help but ask: "Master Hou, what are you going to do with these things? Uh..."

After speaking, Pang Feiji immediately regretted it. In the big family, the most taboo thing is to know too many things!

Li Zexuan was not angry. He raised his eyes and glanced at Pang Feiji, and said, "You will naturally know then! By the way, did you destroy the previous list?"

Seeing that Li Zexuan didn't blame him, Pang Feiji breathed out a sigh of relief and replied, "The list is here, it hasn't been destroyed yet!"

Li Zexuan lifted the sack with one hand, walked towards the door, and said lightly, "Remember to burn the list later!"

Pang Feiji was stunned for a while before saying, "Yes!"

But at this time, where is Li Zexuan's figure next to him? The latter has already gone to the backyard to do things!

. . . . . . .

"Master, the concubine is back!"

As it approached noon, Han Yuxi returned from Chang'an City, and as soon as she entered the room, she called out as usual, but there was no response from the inside.

At this time, Xiao He appeared out of nowhere and said, "Young Madam, Young Master is doing things in the backyard alone!"

"Oh! Then I'll go take a look!"

Han Yuxi put down a package in her hand, then clapped her hands, raised her feet and walked towards the backyard.

Of course Pang Feiji, who was guarding the front yard, heard it, but he would not foolishly stop it. Although Li Zexuan told him not to let outsiders enter the backyard, Han Yuxi was obviously not an outsider!

"Ma'am, are you back?"

In the backyard, Li Zexuan was using glue to make a thick paper tube. The diameter of the paper tube was a little thicker than that of the thumb, and the height of the tube was about twenty centimeters. There were materials scattered around him. Li Zexuan, who was fiddling in the yard, heard footsteps and said without looking back.

Knowing people by hearing, this is the tacit understanding between "old husband and wife"!

Speaking of glue, many people subconsciously think that there was no glue in ancient times. In fact, there was, but it was not chemical glue in the modern sense!

The glue Li Zexuan uses now is fish bladder glue, which, as the name suggests, is made of fish bladder. The fish bladder is steamed, boiled, smashed, filtered and other procedures, and finally fish bladder gel is obtained. When in use, it is heated by water, melted and then coated on the surface of the object. After cooling and drying, it can be successfully bonded. In terms of viscosity, it is much stronger than most modern glues!

In addition to fish maw glue, there is also pig skin glue.

It is made of pig skin, which is boiled and turned into a glue-like thing.

It can be said that the wisdom of the ancients in terms of tools and materials is not as weak as most people think!

"Well! Xianggong, what are you doing?"

Han Yuxi saw paper tubes lying on the ground and other materials scattered everywhere, she couldn't help but wonder.

Li Zexuan thought for a while and said, "Well... I'm making something similar to firecrackers for my husband, but it's not only louder than firecrackers, but also prettier than firecrackers! Madam, you just came back, go and rest, for the sake of It'll be ready in no time!"

That's right, Li Zexuan just wanted to make fireworks. At this time, the "firecrackers" wrapped with gunpowder had not yet appeared. There were only "firecrackers" or "exploding rods". The joints are all closed. When heated by fire, the gas inside expands. If the bamboo sticks are swelled by continuous heat, they are called firecrackers.

Usually during the Chinese New Year, this is what the children like to play with the most. It is often seen on the street that there are children in groups of three or five throwing bamboo poles into the fire. They mainly want to hear the sound!

The official gunpowder firecrackers were only recorded in the Northern Song Dynasty, and they were also called "weaving firecrackers" at that time.

The kind of fireworks that Li Zexuan is making now that can be lifted off with the help of gunpowder, there must be no more in the Tang Dynasty...

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