At this time, it is the evening, and the lights of Suzaku Street are beginning to be lit up, because there is a curfew for another hour, so the surrounding area of the imperial city seems to be more and more prosperous.

The young man stood at the base of the imperial city with his hands in his hands, surrounded by a group of envoys who listened with their ears up. His crisp and slightly proud voice resounded through the street, and unconsciously attracted many people shopping.

"Someone wants to solve His Majesty's problem? Let's go and listen...... "First, a common man found out about what was going on here, and then shouted to the street, and in an instant, the crowd came to hula, and a large number of people quickly gathered at the root of the imperial city.

Some people's eyes flashed, and they said with smug faces: "See, this little brother is from our Tang Dynasty, foreign envoys still can't do it, you have to ask us for help if you encounter problems." ”

Now the whole of Chang'an knows the allusion of Li Shimin's problem of recruiting a son-in-law, and the people are proud to see that there are Han teenagers helping to answer questions.

The crowd came in a heap, and it gradually became noisy and noisy, but for some reason, the Yulin guards guarding the imperial city did not come to drive them away.

Not only did they not come to drive them away, but they looked over here one by two with their arms crossed, obviously these Yu Lin guards stationed in the palace were also curious, and they also wanted to know how to solve His Majesty's problem.

General Yulin Wei drank down on the walls of the palace, and encouraged him warmly: "Whose little brother is that, but you want to fight for us, let these idiots of different races have a good look, and the world is smart out of the Central Plains......"

These words caused laughter in the hall and attracted more people to come and watch.

The envoys of the various countries present were red-faced, but they couldn't move to drive away the crowd, Lu Dongzan coughed stupidly, and urged the young man: "Brother Yan, please solve the problem quickly." Regarding the matter of moral compensation, the old man will be grateful afterwards. ”

The young man glanced at him, opened his mouth proudly, and said lightly: "There is only one way to thread the pearl." This method involves a lot of knowledge, including hot and cold chemistry, ice and water fluids, gravitational mechanics, and biological tropism. This Tibetan minister, do you know the chemistry of heat and cold? ”

Lu Dongzan's face was dazed, and the surrounding envoys also looked at each other.

The young man sneered a few times, and squinted at a forty-five-degree angle proudly.

Lu Dongzan coughed, and suddenly said with a solemn face: "I beg to enter the palace and let the Tang Emperor give you a pearl to demonstrate." ”

"No need......" A voice suddenly sounded at the gate of the palace, which sounded very familiar and proud, and the envoys turned their heads in surprise, and found that Li Shimin was coming in a hurry.

The emperor was also accompanied by several concubines, among whom the eldest grandson Empress was dragging the pearl in her hand, Li Shimin laughed, and said with blazing eyes: "There is such a lively event at the door of my house, how can the widow not personally participate in it, that little brother is Yan Jingzhi of the Yan family, I heard that you worship under the door of Wu'er, and you are the fourth disciple of the family......"

The young man hurriedly knelt on the ground and kowtowed, and said respectfully: "Xuesun is Yan Jingzhi, who has seen His Majesty and Niangniang. ”

Li Shimin just smiled and waved his hand to calm the young man.

The eldest grandson seemed to love the house and Wu, and praised: "What a good boy, Yue'er's good apprentice." ”

Yan Jingzhi was a little embarrassed, and her originally proud little head lowered her head.

Li Shimin suddenly said: "Okay, don't delay any longer, the ministers are waiting to see you solve the problem, and the people also want to see a lively time, if I delay the time again, I am afraid that I will be secretly scolded." Guanyin, you take the pearl to our apprentice grandson, and let him demonstrate how to string the pearl. ”

The eldest grandson chuckled lightly and held the pearl and stuffed it into the young man's hand.

There was another palace maid next to him holding a tray, on which was placed extremely fine and extremely fleshy silk, obviously the emperor heard the wind at the door in the palace, and had prepared the props for the pearl stringing.

Yan Jingzhi coughed lightly and whispered: "You also need two water basins, two buckets, one of which is for cold water, one for hot water, a few catties of saltpeter, and a stack of absorbent paper. ”

Li Shimin's eyes were slightly stunned, obviously he didn't understand why he used so many irrelevant things for stringing, but the emperor immediately waved his big hand and ordered in a deep voice: "Hurry up and prepare ......"

When a few eunuchs panicked, they turned around and ran, and after a short time, they found these things from the Internal Affairs Office.

At this time, it was already the beginning of night, and the entire palace was full of people who came to hear the news, just because the emperor did not give the order to kill people, so countless spies of the Baiqi Division had to put on makeup and hide in the crowd to be vigilant.

Yan Jingzhi held the pearl with one hand, first asked someone to bring the cold water bucket, and said crisply: "The pearl threading, first of all, involves fluid mechanics, I put the pearl into the water, and let the holes in the pearl be filled with water flow......"

As he spoke, he really sank the beads into the bucket, and carefully filled the Jiuqu panhuan in the pearl with cold water.

"And then?" Li Shimin is obviously not a patient person.

Yan Jingzhi grinned, and the fingers of both hands each blocked a tiny hole in Mingzhu, but turned his head and said to the palace guards: "Brother Lao threw saltpeter into the cold water bucket, thank you for your hard work." ”

The guard hurriedly bowed down and said, "Don't dare to call it hard, you are Your Highness." As he spoke, he took a few pounds of saltpeter and threw them into the water.

After this thing was thrown into the bucket, there was a strong chemical reaction after a while, but when I saw the slightest white gas rising up, the bucket faintly showed signs of freezing.

Yan Jingzhi abruptly took the silk thread in the palace maid's tray, carefully pasted it at the hole of the pearl, and then gently placed the pearl on the frozen ice ballast, all the movements seemed cautious.

Everyone looked at it in a daze, Li Shimin looked at the cold water and was amazed, and couldn't help but say: "Doll, tell me the truth......

Yan Jingzhi wiped his forehead lightly and said respectfully: "Saltpeter is like water, absorbing heat and freezing, this is the science of heat and cold transformation, and only the research institute teaches it in the world." The disciple filled the pearl with water, and then put the silk close to the pearl hole, the water inside the bead would freeze when the hand was cold, and then the silk thread at the hole hole would be frozen. ”

As he spoke, he lifted the silk thread lightly, and actually lifted the beads, and he pointed to Mingzhu and explained to the emperor: "Your Majesty, look, the silk has been stuck to the hole......

"So what, I didn't wear it!" Li Shimin didn't know whether he really didn't understand or deliberately cooperated, in short, every sentence was to the point.

Yan Jingzhi walked to the side of the hot water bucket with the pearl, slowly put the lower part of the pearl into the hot water, and then said: "Warm the lower part of the pearl with hot water, the ice in the lower part will melt first, and the ice in the upper part will melt later, in the process of melting, the ice can flow with the melted water, this is ice water fluid mechanics, and only the research institute in the world will teach it......"

As he spoke, he looked at the pearl carefully, and suddenly took out the pearl quickly, held it up for everyone to see, and said: "Your Majesty, look, this pearl has two holes, just now I deliberately divided into upper and lower positions and sank into hot water, the ice below has melted, but the top has just begun to melt." ”

Everyone nodded, and Li Shimin and the eldest grandson glanced at each other.

Yan Jingzhi continued to explain: "The ice in the bead passage has been able to move slowly, so there is continuous water flowing out of the hole below, but the hole above has not yet melted, and the ice in this hole freezes the silk thread. ”

Speaking of which, there are smart people who have already vaguely guessed the answer.

Lu Dongzan's eyes flickered a few times, and he suddenly said: "I understand, the ice cubes that freeze the silk threads flow with the water, and they will pull the silk threads to slowly pass through the pearl, as long as they keep rolling the beads to adjust their orientation, and finally the ice cubes will pull the silk threads through the nine curved panhuan of the pearl." ”

Yan Jingzhi nodded and smiled, and said proudly: "This is the gravitational force of all things, and it is necessary to ensure that the water flow is always downward." ”

The family next to him frowned slightly, and said loudly: "Although this method is bizarre, the truth is the same as the ant threading that this girl thinks, it is to use other things to attract the silk thread to travel, and then pass through the pearl's nine-curved panhuan......"

Yan Jingzhi glanced at her and snorted, "That's a good thing, you go find an ant that can drill this pearl?" My teacher had long expected that someone would come up with this solution, so he found a pearl with holes as thin as hair. If you want to solve the problem of the family teacher, there is no one in the world. ”

Jia He Yaxiu sighed lightly, his eyes kept flashing, and suddenly asked again: "Just now, Jingzhi Gongzi said several knowledge, can these studies be studied in the research institute?" ”

Yan Jingzhi raised his head proudly and said loudly: "All-encompassing, the principle of the poor world, the three thousand knowledge in the world, can be asked in the research institute......"

Jiahe Yaxiu nodded, suddenly turned around and knelt down at Li Shimin, crying: "Your Majesty the Tang Emperor, I am a small country on the sea, and the domestic people are difficult and suffer from all kinds of hardships. However, the people of Dongying admire the Tang Dynasty, since the Eastern Han Dynasty Festival there are envoys to, now Dongying sent people again, the little woman led three thousand Tang envoys, we floated across the ocean without fear, the food and sleeping in the open did not feel bitter, the distance can be regarded as thousands of miles, but the heart is looking forward to the prosperity of the Tang Dynasty. I beg Your Majesty to be gracious, so that Dongying students can enter the research institute, if this matter is completed, it will be remembered for thousands of years. ”

Li Shimin groaned, his eyes were a little greedy and fell on his delicate body with elegant curves. Jia He Yaxiu suddenly smiled, but this time his movements and expressions looked pitiful.

The emperor was about to nod his head in agreement, when suddenly Yan Jingzhi next to him pretended to exaggerate and shouted, but there was a cheer all around, only to hear Lu Dongzan laugh and say: "It's passed, the pearl silk thread has passed." ”

Li Shimin was a little annoyed, but it was inconvenient to attack here, the emperor's eyes turned to Yan Jingzhi, and saw that this kid was holding a pearl that had been passed on to the silk thread.

Lu Dongzan came out of the crowd and solemnly bowed his hand and said: "Your Majesty the Emperor of the Tang Dynasty, now that the pearl stringing has passed, the first topic has been completed, because the little brother of the Yan family is invited by all the envoys at the same time, I wonder if Your Majesty can be counted as if everyone has passed the test?" ”

These words spoke the hearts of many envoys, and all those present looked at the emperor with their eyes.

Li Shimin waved the sleeves of his robe heavily, nodded and said, "Since you invite people together, you should all have passed." ”

The crowd rejoiced.

Lu Dongzan's eyes were burning, and he suddenly asked again, and said solemnly: "Emperor of the Tang Dynasty, I once said four questions, since the first question has ended, I don't know if I can continue the second question?" ”

……

…… Today's first update arrived, 3100 words