"You have the word "Li Shimin..."

Li You's words directly made Xu Yi's grandfather and Zhu Xufan jump up. You should know that the flying white body of the Emperor Li Shimin of the Tang Dynasty has always been a place where modern people can't live, because Li Shimin only has inscriptions and calligraphy, and there are really no copybooks.

So when Li You said that he had the word "Li Shimin", how could you say that Grandpa Xu Yi and Zhu Xufan, two old men who love Tang culture, were not shocked?

Li You looked at the two old men's interest in Li Shimin's handwriting and immediately replied: "Yes...but, I have to wait for me for a month, and the things are not around now."

"We can wait..." Xu Yi's grandfather and Zhu Xufan spoke in unison.

After saying this, Zhu Xufan transferred the money to Li You. Although the four of them started to eat, after the meal, Li You said goodbye and left first because unlike them, Li You still has something to do.

After all, Li You only has one day in modern times.

Because the conversation was too speculative, it was already past 9:00 at night. Li You went to Pangdonglai to buy things, perfume, glass products... These are all necessary. You must know that Li You can rely on these to gain a foothold in the Tang Dynasty.

However, when Li You entered Pangdong, Li You saw candles immediately. To be honest, Li You was quite interested in this lighting, because the Tang Dynasty candles were very expensive at this time. The candles at this time were not paraffin wax, but beeswax... The Song Dynasty recorded that in the border trade with Xixia at that time, the trading supplies were candles. As a kind of foreign trade and foreign exchange, candles were very precious.

The people of the Tang Dynasty were like Li You's Dunhuafang. They basically slept at night. Some people would light a small oil lamp when they had something to do at night. It was already amazing. Li You still had more ideas about the lives of the people.

He wanted to make candles, which could alleviate some people's desire for lighting. He just waited for Li You to ask about the candles and only realized that it was too early for the Tang Dynasty to make candles at this time.

A college salesperson from Pang Donglai told Li You that if you want to make cheap candles after all, you can either extract stearic acid... What is stearic acid? It is a white substance. It feels greasy when touched by the hand. The candle made of it has a soft texture. Not only does it have bright flames when burning, it also has almost no black smoke, does not pollute the air, and the price is even cheaper.

But extracting stearic acid... It is said that first uses strong alkali to saponify the oil, then decompose the obtained soap with hydrochloric acid, and take out the stearic acid.

Li You can still think of a solution for strong alkali, but Li You is really helpless in this hydrochloric acid. In addition to stearic acid, there is also paraffin... In 1825, Schevrel and Gei-Lussac obtained a patent for the production of paraffin stearic candles.

The emergence of paraffin stearic candles opened a new era in the history of human lighting. Later, some people discovered large oil fields in North America, so a large amount of paraffin could be extracted from oil. The more ideal candles were therefore popularized and promoted around the world.

This is even more difficult... Just when Li You gave up, the college salesperson on the side suddenly asked Li You: "Sir, do you want to buy mutton oil candles..."

"Can wet oil be used to make candles..." Li You looked at the other person in surprise.

"Of course... our village has always made mutton candles...wax, color, shape, and cool...We in Duanbolan Town, Jimo District have a long history of making wax. Since the Ming and Qing Dynasties, there was a wax workshop in Xidayuzhuang Village. At that time, the wax was mainly made of butter, mutton oil and other substances.

Later, with paraffin, Xidayuzhuang Village began to make candles with paraffin, mainly lighting candles, but the red pair of wax used in major ceremonies must be used with sheep oil."

"Really...will you know how to make it..." Li You looked at the college salesperson in surprise.

The college salesperson nodded for granted and replied: "Every three-year-old kid in our village knows...!"

"Then can you tell me..." Li You asked, and then quickly continued, "I can give you a reward..."

"Haha..." The college salesperson laughed: "Sir, there is no need for compensation. There is no secret to lamb oil candles. I'll tell you how to make wicks later, that's the secret!"

Later, when Li You bought things, the college salesperson clearly wrote how to make lamb oil candles on a piece of paper. The first step was how to do it and the second step was how to do it clearly.

However, it is really simple, it is a bit difficult to make wicks, but it can also be done in ancient times.

Li You later gave the college salesperson 10,000 yuan as a thank you. You should know that this mutton oil candle is really helpful to him. Although the mutton from the Tang Dynasty is not cheap and the oil plays an important role, if the mutton oil is made into a candle, I dare not say that it can bring light to the people of the Tang Dynasty all over the world.

You can also leave a technology, at least some of the things you can't afford, and this is also a way to make money.

You should know that the candles in the Tang Dynasty are really too expensive now. A better one costs 500 to always be... and there are very few, but if this sheep oil candle can be brought back to the Tang Dynasty, although the price of sheep oil is not low, compared with candles, it is simply too low.

After taking the method of making lamb oil candles, Li You went to buy some essential items and drove home because it was already twelve o'clock in the morning, and Li You was also tired at this time.

Just as Li You drove the car back to the basement of the community he had just bought and moved all the things into the basement, Li You's cell phone rang.

Li You originally thought it was Xu Yi, but when Li You picked up the phone, he found that although the voice coming from the phone was also a girl, it was not Xu Yi's voice.

But another girl had a crying voice.

"Mr. Li...you...you...can you come to my school...please, please help me with a certificate...!"

This crying made Li You feel nervous and he asked quickly: "Are you Xiao Tang...what is wrong with you?"

"Mr. Li... Can you come to my school to help me with a certificate? I didn't steal the bag, nor did I do anything shameful. My money comes openly...!" After saying that, Xiao Tang cried sadly again.

Li You is a bad guy, especially to the little girl. When this girl named Xiao Tang cried, Li You immediately softened her heart and replied quickly: "Xiao Tang doesn't cry... I'll come over immediately... Don't worry, there will be no problem... I can help you with evidence."

After saying that, the phone was hung up. Li You, who was about to go upstairs, had to go back to the car again. Xiao Tang told Li You that her school was Fengfan High School... This little guy is just a student in the third year of high school and is only eighteen years old this year.

My God... Li You shook his head repeatedly.

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Chapter completed!