Not to mention you, even many modern people don’t know that there is a discipline in chemical engineering called “physics and chemistry”. Let you see the power now.

As long as it is metal, it will sink into the water. This is common sense. Chen Wanrong's subversive conclusion was not so confused. Chen Wanrong was not surprised at all. He picked up the silk thread and walked through the needle nose, tied a knot, and tied the needle nose. He pulled off the excess silk thread, tied it not far from the needle tip, and held a silk thread in one hand.

Take a breath, try to calm your breath, and carefully put it towards the water surface. Put it down little by little until the embroidery needle is evenly in contact with the water surface, then gently release the thread and tiptoe to retreat: "Who is here to verify it?"

"I'll do it!" Mr. Qi said without thinking. He took a big step, and with a sound of kicking, he wanted to fly over to see what was going on.

Chen Wanrong hurriedly reminded him: "Mr. Qi, please be gentle. Be careful, even breathing as light as possible."

Although Mr. Qi didn't understand why Chen Wanrong had such regulations, he would do it as he took a breath and calmed his breathing down. He walked over and looked into the basin. His eyes immediately widened and his mouth was wide enough to stuff an egg into it.

"Mr. Qi, what's wrong?" Huang Boming and a crowd of people were curious and asked in unison.

Mr. Qi swallowed his saliva and said blankly: "It turns out to be true! The needle did not sink into the water."

There was an uproar, and the students stood up and rushed over in one after another, shouting, "Let me see!"

Chen Wanrong shook his hands and reminded them: "Be gentle, be gentle." The students then took a light step.

Chen Zairong was the most skilled in controlling this force. He rushed over in a few seconds, without any sound when he landed on the ground. When he looked in the basin, the embroidery needle floated quietly on the water. He couldn't help but feel happy, and hugged Chen Wanrong and shouted loudly: "Brother, you are so amazing!"

He was very strong when he was excited. Chen Wanrong felt an iron hoop swaying him, and he couldn't breathe, and hurriedly said, "Let me go!"

Chen Zairong let go as he said, looking at Chen Wanrong, with joy on his face, thrusting his chest and raising his head, and introducing him to Mr. Qi: "Mr. Qi, this is my brother! My brother may do it!" Where is the introduction person, it is just bragging. If the brother shows his face like this, who doesn't feel infinite glory as a younger brother?

Mr. Qi responded blindly: "Ability, capable! OK! Is he your brother?"

Huang Boming and the students came over carefully, and after seeing it, they stepped back with satisfaction. Mr. Qi, who had been stunned for a long time, finally got back on his energy and hurriedly asked for advice, saying, "Mr. Chen, what is the principle?"

What he said was exactly what everyone thought, and he looked at Chen Wanrong and was eagerly waiting for the answer. Even Chen Zairong looked at Chen Wanrong with a look of eagerness, as if saying, "Brother, please tell me quickly."

"This principle is actually very simple!" Chen Wanrong gave them an example to explain, which is beneficial to their understanding: "We have a layer of skin on our hands, which will be pierced and painful if we pricked with needles. If we place the needle flat on it, it will not break. The water surface is like our skin. As long as we place the needle flat on it, it will not fall down if it does not break."

Theoretically, if a piece of paper is placed vertically, it is okay to drive a truck on it. This principle is somewhat similar to this. The difficulty is that the water surface cannot be destroyed when the needle is placed. Chen Wanrong's strength is controlled well, so that the needle floats on the water surface. You can do it by practicing more, and there is no profound truth.

The reason why you tie the needle with a thread instead of holding it with your hands directly is mainly inconvenient. If you accidentally have a finger, you will destroy the water surface.

The reason why Chen Wanrong reminded everyone to be gentle is that the needle will sink when it vibrates.

This principle is easy to understand, and everyone suddenly realized that the "Oh" sounded into a long list.

Chen Zairong was very excited and said in his eyes: "Brother, I'll try it." He took out the embroidery needle, wiped the water stains on the needle under Chen Wanrong's guidance, and carefully put them down as Chen Wanrong did.

The key point is stability. He is practicing martial arts, so it is not difficult to do this. When he lets go of the thread, the embroidery needle floats quietly on the water. Chen Zairong couldn't help but be overjoyed: "It's done, it's really done! It's not difficult! Why didn't I think of it before?"

"Yes! Why didn't I expect it?" Everyone agreed in unison.

This matter is contrary to common sense and is subversive. No one can tell you. Once you have witnessed it, it is very simple, and you have to have the idea of ​​"so it's the case". Chen Wanrong understood their feelings very well. If he hadn't learned so much knowledge, he wouldn't believe it.

"Things in the world are so wonderful!" Mr. Qi sighed with high fives.

"Did you believe it?" Huang Boming asked with a winger's attitude and blinked his eyes.

Looking at his blinking look, Mr. Qi knew what he was thinking and said, "Okay, I'm my business." It means that he treats a meal at noon. Although he didn't say a word of losing, he had already admitted defeat. Huang Boming smiled and said, "This is the word!"

"Let me try it!" Mr. Qi took out the embroidery needle and asked Chen Wanrong with conscientious advice: "Mr. Chen, please give me some advice." His attitude was very sincere, completely different from his disdain just now.

Chen Wanrong was a modest person and smiled and said, "Mr. Qi is so serious, so I dare not give advice." He now pointed out Mr. Qi for the experiment. Chen Wanrong's key points were very clear, but his strength was not a problem. Either the needle's nose destroyed the water surface, or the needle's tip pierced the water surface, or the force was too strong and it sinks directly into the water.

After trying several times, he failed but failed and had to give up. Huang Boming tried several times, just like Mr. Qi, but he did not succeed. The students were also curious and moved, and they also tried each other. However, they were not well controlled and they did not succeed.

Among dozens of people, Chen Zairong succeeded alone. Chen Zairong only felt the supreme glory, his chest was straightened and he was extremely excited.

After being excited, Huang Boming asked for advice: "Brother Wanrong, what is the reason why water doesn't pour out? Can Brother Wanrong give me a message?"

Mr. Qi touched Huang Boming and smiled and said, "I am so happy that I forgot about this."

This is a physical pressure problem. They must have heard all the words of 1510. Chen Wanrong made another example and shook his right hand: "Mr. Qi, there will be wind when his hand shakes. I gently pressed the edge of the cup with my hand. The purpose is to have no wind in the cup and cover it with paper, so that the water will not be poured out if it is poured over."

If the Tang people heard the word air, they would be confused. Chen Wanrong said that wind was easy for them to understand.

"Can I try this?" Mr. Qi solicited Chen Wanrong's opinion.

"Please." Chen Wanrong gave a little advice. Mr. Qi made it and turned the teacup over. The water did not flow out. Mr. Qi was so excited that he was almost like a rooster and went to the room to crow. He kept saying, "It's so unbelievable!" He put the teacup and grabbed Chen Wanrong's hand: "Brother Wanrong, go and drink, don't drink until you get drunk today! Rong, you will come too!"

Chen Zairong responded happily and followed Huang Boming quickly, making the students so envious, wishing that he would have a capable brother like Chen Wanrong.

The second one is that the operation is more difficult and not difficult. The first one is that elementary school students can do it, but they can actually make it through food and drink. Chen Wanrong is really a bit unbelievable.

Mr. Qi called Qi Xianming and was very happy. He ordered a large table of wine and food. The four of them were drunk and then gave up. In terms of the degree of richness, they were not as good as the meals that Li Qingquan invited Chen Wanrong to drink, but Chen Wanrong was not a glutton, and he would not judge the quality of people based on the exquisite and richness of wine and food.

Chen Wanrong found that Qi Xianming was straightforward, which was very happy to Chen Wanrong's appetite and spoke very happily. When he was happy, Qi Xianming invited Chen Wanrong to participate in the spring tour event on March 3. The spring tour event organized by the school hall generally does not invite outsiders. Qi Xianming invited him to give him a lot of face, but Chen Wanrong had to sell soap on March 3, so he had to politely decline. This made Qi Xianming very regretful.

This meal took a lot of time, and it was almost afternoon class time when the account was held, so the three of them hurried back to the school. Chen Wanrong drove Xiao Hei and said goodbye to the three of them. Chen Zairong sent the boss for a long time before saying goodbye.

He drove the ox cart straight to the vegetable market. He saw a large oil mill called "Hu's Oil Floor". Chen Wanrong thought that using vegetable oil to make soap only requires filtering and removing the oil corners inside. Using lard to make soap must also be pre-treated, which is relatively troublesome. If there is enough vegetable oil in this oil mill, use vegetable oil to make it easier.

He had a certain idea, so he parked the ox cart in front of the oil mill and stepped into the oil mill. A middle-aged man with a bush of beards under his chin was dozing off behind the counter. Chen Wanrong coughed, and the middle-aged man opened his eyes and smiled on his face: "Call the guests, are you going to buy oil?"

"I want several hundred kilograms, do you have it?" Chen Wanrong, the lion, spoke up.

How could a business person be afraid of big customers? The middle-aged man smiled and said, "Yes, yes! Customer, do you want sesame oil or almond oil? Red basket flower seed oil, vinegar oil, xanthium oil, and black lemon oil shops. Customer, what do you want?"

Chen Wanrong didn't know enough about the life of the Tang Dynasty. He thought it would be good to have three or two, but he didn't expect that the shopkeeper would tell so many names like a treasure. Chen Wanrong was really surprised that there were so many oils in the Tang Dynasty. He smiled and said, "I want any of them the most and the cheapest."

"Customer, I, Hu Sanhai, will never hide it from you. The cheapest one is black squid oil. That thing is squeezed from trees and no one eats it, so the small shops are rarely made. The most is sesame oil, but the price is a little more expensive than black squid oil, but not much." Hu Sanhai introduced to Chen Wanrong.

Sesame oil is sesame oil. It was brought back by Zhang Qian from Dayuan and planted in large quantities in the Western Han Dynasty. It was the first vegetable oil in Chinese history. Before the Western Han Dynasty, daily life was mainly used for animal oil. Since the Western Han Dynasty, vegetable oil was officially available, which has contributed to the improvement of the living standards of the people.

In ancient times, the amount of sesame was grown was large, and the corresponding amount of sesame oil was also quite large.

"Okay, give me four hundred kilograms." Chen Wanrong thought for a while and reported the quantity.

"Four hundred kilograms?" Hu Sanhai was shocked and almost jumped up. He looked at Chen Wanrong in surprise: "Customer, please forgive me for saying more words. What do you want so much oil?"

Tell him that it is not impossible, but there is no need. Chen Wanrong did not answer the question: "Is there any?"

Hu Sanhai thought for a while and then said, "Celebrity, it's true that sesame oil is only about 300 kilograms. Otherwise, I'll give you some other oil."

"No need, just sesame oil, you need as much as you want." Chen Wanrong thought that three hundred pounds would be a lot, and it would take several days to make it.

"Customer, please wait, I'll give you a thumbs up." After Hu Sanhai explained, he shouted inside, and two guys covered in oil came out to help him. After finishing, he moved the oil barrel to the ox cart. Chen Wanrong paid the money and said goodbye to Hu Sanhai and drove the ox cart.

Sesame oil contains a lot of oil horns, which can be removed by filtration. To filter, cloth must be used. Chen Wanrong went to the cloth shop to buy a linen before going home.

With Xiao Hei's incident of cow madness, Chen Wanrong paid special attention to whether there was a woman dressed in red on the official road. Fortunately, Xiao Hei did not commit cow madness until he returned home.

If Chen Wanrong had returned home in the past, Chen Houshi and his wife would come to greet him from afar, but today it was quiet and there was no one. Chen Wanrong couldn't help but feel a little strange. When he arrived in front of the room, he saw the door wide open and Chen Wang was working at the table. As for what he was busy with, Chen Wanrong was a little far away and couldn't see clearly.

"Mom, I'm back." Chen Wanrong jumped out of the car.

Chen Wangshi hurriedly put down the work in her hand and greeted her with a smile: "Wanrong, you are back! Have you bought lard?"

"Mom, I didn't buy lard, I bought sesame oil." Chen Wanrong knew she would ask and explained to her: "Mom, using sesame oil can also be used as soap, which is more convenient than using lard."

Chen Wang was suspicious, and after hearing this, he felt relieved and smiled and said, "Wanrong, come and move it down first." The two of them worked together to move the oil down and put it under the eaves.

"Wanrong, you are tired from the road. Let's take a break first. Mom is going to get off the car." Chen Wangshi drove Xiao Hei to get off the car.

Chen Wanrong responded and entered the room. He saw beautiful cloth flowers on the table. He couldn't help but be surprised. He quickly stepped up and picked up one. He bought it very heavily. A piece of linen wrapped in a square piece of stuff. Chen Wanrong didn't have to think that it was soap.

What surprised Chen Wanrong was not the soap, but the cloth flower. The size of this cloth glass was really nice and the style was unique, which looked better than the cloth flower decorated with sea bass sashimi that Chen Wanrong saw in Li Qingquan. The only disadvantage was that the cloth flower was folded out of linen, and the fabric was not excellent, which destroyed its beauty.

"Wanrong, your father contacted the carpenter to make boxes. When my mother had nothing to do at home, she would give some flowers." Chen Wangshi came in from outside the house and explained to Chen Wanrong: "Mom wanted us to go to Chang'an to sell soap, but we had to prepare well. Chang'an is at the foot of the emperor, with many knowledgeable people, and they have high vision. It is not that good things look down on them. It would be better if we could give some flowers and embellish them."

Packaging is a science, and good packaging can make the product sell more smoothly. Chen Wanrong praised this from the bottom of his heart and said, "Mom, you are right! I will buy some silk tomorrow, and the flowers folded from silk will definitely look better. Mom, teach me how to fold them."

Chen Wang picked up a piece of cloth and set a demonstration. Chen Wanrong was smart and could do it again. The mother and son studied it for a while and improved it a little, and the cloth flowers looked even better.

In the evening, Chen Laoshi came back and told Chen Wanrong proudly that the matter of the box was settled. He asked Chen Wanrong to let him rest as he could not mislead the matter.

The difference between using vegetable oil to make soap is that it needs to filter and remove the oily corners, and the rest are the same. In the next few days, the three of them started making soap. Now they are spices, packaging, and additives and bean powder. They are very smooth to make. They made nearly 300 yuan in just a few days.

Even if each piece of money is sold for hundreds of coins, Chen Laoshi was so happy that he asked Chen Wanrong to buy some raw materials and make it. Chen Wanrong counted the remaining money, but there was less than twenty coins left. He still needed some money to go to Chang'an as "activity funds" and did not purchase raw materials anymore.

Now the soap is no longer comparable to the first time it was made. It has a stronger fragrance and better performance. According to Chen Wanrong's personal experience, the discomfort caused by dryness after adding soy powder to bathe has been greatly reduced. There is also a strange thing, that is, the aroma does not dissipate for a long time, as if it was sprinkled with perfume, and the fragrance remains for several days. I really didn't expect that the quality of ancient Chinese spices was so good, and Chen Wanrong was very grateful to Wu Jing.

The capital is limited and I can't do more, but Chen Wanrong strives for fine work and does a lot of effort. It was not until the first day of March that it was all done. On the afternoon of March, Chen Zairong also came back and held a simple family meeting. Chen Wanrong and Chen Zairong unanimously decided: March 3rd is very lively, and Chen Laoshi and his wife have never gone far away in their lives, and they have never seen the lively atmosphere of March 3rd. The whole family goes to Chang'an!

Needless to say, Chen Zhen was so happy that his face was red. Chen Wang didn't want this, but his beloved son had such filial piety, how could he not move her? He was so excited that he burst into tears.

After breakfast on the second day of March, I cleaned up a little and locked the door. Chen Zairong drove the ox cart and carried soap. The family happily headed straight to Chang'an.
Chapter completed!