Xue Lang was a happy guest at Su's house, but Pang Qingyun, the general of the Southern Ya Jin Wuwei, frowned because of the three young men who were brought back, and said solemnly: "Chen Wei, you tell me about the situation again." ”

"Whoa!"

Chen Wei, who knelt down on one knee, said: "The lowly post was patrolling the city today, and someone held a token of Changping County to report that someone wanted to shoot the Changping County Duke on the street. The humble official hurriedly brought people over to check, and the two sides of the conflict were Lu Jing and the Changping County Duke. The entourage of Lu Jing and others has been defeated by the guards of the Changping County Prince. Lu Jing and the three were surrounded by four spirit dogs, Lu Jing held a bow and arrows in his hand, and there were arrows shot on the ground and on the wall. ”

Pang Qingyun's expression became more serious, and he confirmed: "In this way, Lu Jing did open the bow?" ”

Chen Wei said: "Yes." Lu Jing argued that he didn't know Xue Jungong's spirit dog, thinking that it was a wild wolf that ran out to forage for food and hurt people, so he shot with a bow. ”

Pang Qingyun snorted coldly and said, "Nonsense! In Chang'an City, dare to shoot the bow indiscriminately! Who gave him the authority? Is Lu Jing the guard of the Southern Ya or the forbidden army of the Northern Ya? ”

Chen Wei lowered his head and said in a low voice: "Lu Jingnai is the third grandson of the fourth family of the Lu family in Fanyang, and I heard that he is quite loved by his grandmother in the family, so he is quite arrogant. ”

Pang Qingyun sneered: "Arrogance? Why is it so bad? How dare you open your bow to Changping County? Why don't you know that the saint is very kind to the prince of Changping County, don't say that the Fan Yang Lu clan, even if it is a child of the clan, if he dares to open the bow to Changping County, the saint will not spare it! ”

Chen Wei replied: "I have heard that there is a righteous brother in Changping County, named Jiang Lin, who married the fourth daughter of Su Lun, a doctor of arithmetic from Guozi Jian Taixue. Lu Jing had taken a fancy to this woman before and wanted to hire her as a concubine Teng, but Su Lun refused, and was beaten by Jiang Lin when he sent someone to propose marriage. ”

Pang Qingyun asked, "Is Jiang Lin here today?" ”

Chen Wei said: "General Hui, I heard that Jiang Lin is strong in martial arts, and he served as a captain in the army of Princess Pingyang. Today, the prince of Changping County went to visit the Su family, and Jiang Lin was naturally present. ”

Pang Qingyun showed a sarcastic smile on his face: "That's the case!" The Lu family really teaches his son well! However, this place is Chang'an, not Fan Yang, when did the prestige of the Lu clan spread to Chang'an, and when did I Jin Wuwei come? ”

Chen Wei shrank and immediately pleaded guilty: "If you are guilty of despicability, please punish the general!" ”

"That's it! You were born in Fanyang, and you have heard the prestige of the Lu family for a long time, so you will be afraid of the Lu family. However, this matter is not within the purview of Jin Wuwei, and it should be handed over to Chang'an Mansion. This general allows you to do your best to make a little friendship with your fellow villagers and inform the person in charge of the Lu family's capital. ”

Chen Wei immediately saluted gratefully: "Thank you for your compassion to the general." ”

Pang Qingyun said: "You send someone to wait outside the gate of Huaiyuan Fangfang, and when the Changping County Duke comes out, you can tell him, due to the limited authority, Lu Jing and the others, Jin Wuwei has been handed over to Chang'an Mansion, and Xue Jungong, as the bitter master, can avenge Yin of Chang'an Mansion." ”

"Whoa!"

Chen Wei took the order and left.

Jin Wuwei and Chang'an Mansion turned their backs for a while, what about Xue Lang? He was also a guest at the Su family, and was discussing Arabic numerals and mathematical symbols with the Su family father and son.

A group of men gathered around a desk, Xue Lang took out a pen, Dr. Su took out a bamboo chip, and Xue Lang wrote Arabic numerals against the numbers on the bamboo chip.

The study of mathematics in ancient China was very advanced, and in the book "Nine Chapters of Arithmetic", there are not only the algorithm of plane geometric area, the calculation of fractions, the opening square, the opening square, the volume calculation method of solid geometry, the apportionment of taxes, the equation and other calculation methods, which is the most advanced mathematical work in the world. The latest and fastest updates

The only thing that falls short is the calculation tools. Before the Ming Dynasty, when people calculated, they used bamboo chips, and the bamboo chips were engraved with numbers, so they were also called calculations. After the Ming Dynasty, the abacus appeared, and the abacus method gradually replaced the calculation.

Xue Lang didn't know abacus, and when he used to calculate, he either used a calculator or directly used pen and paper to calculate. In terms of mathematical knowledge, he has nothing to be proud of compared with the ancients, but in terms of calculation methods, his method takes advantage of the convenience of writing, and the calculation is faster.

Dr. Su judged from the perspective of a doctor of arithmetic: "Youyang's method is indeed simpler, even if it is written on the ground without paper, it can be calculated, which is more convenient than bamboo chips." ”

Using bamboo chips to calculate, if it is simple, it is fine, if it is more complex calculations, the bamboo chips alone have to bring a large bag, and then compare Xue Lang's several numbers to write, it is indeed a lot more complicated.

Several men discussed for a while, and Su Mu urged three times to urge the meal, before planning to talk about it with a group of men. Naturally, the food preparation was not as luxurious as the Princess's Mansion and the Imperial Palace, but it was slightly better than ordinary meals, but Xue Lang ate very satisfied. What the guest does is the mind, and nothing else matters.

It's buns, and they've been given preferential treatment. Mother Su seemed to really like them, and the extremely generous one gave a leg of mutton, which made the four dogs mouth full of oil, and Mother Su wanted to add chicken legs to them, but was stopped by Xue Lang-

Dogs are the same as people, they can't be too obese, they will get sick if they are fat, don't think that dogs won't have diseases such as hyperlipidemia and high blood sugar. If you love your dog, you are responsible for your dog's health.

With the amount of exercise they have now, Xue Lang only feeds them one meal a day, and at other times, at most, he gives a small nest made of some fruit or coarse grains, and he doesn't give much, but he just feeds a few grains as snacks.

Su Mu listened, nodded admiringly: "It turns out that raising dogs is also like a lot of exquisiteness, no wonder buns are so humane, civet dogs are civet dogs, and the parenting methods are different from ordinary dogs." ”

Xue Lang couldn't help laughing, but he didn't explain, let Su Mu think that he couldn't tell Su Mu that the reason why Baozi was so smart was because of the crossing.

After feeding, Xue Lang took his leave. Jiang Lin was not at ease, so he naturally followed along. The Su father and son were quite sorry for Xue Lang's farewell, and they felt a little unfinished.

When Xue Lang said goodbye, Dr. Su reluctantly said: "When Youyang comes to Chang'an again, I will definitely come to be a guest again, and I want to discuss with Youyang about arithmetic again." ”

These words brought Su Mu's big white eyes, and Xue Lang agreed with a smile. Su Ran also came out to see off the guests, pulled Jiang Lin and said, "It's over, don't forget to tell the slave family." ”

Jiang Lin nodded. Xue Lang raised his eyebrows, and after he came out, he asked Jiang Lin: "Brother and sister know that we have something to do later?" ”

Jiang Lin said embarrassedly: "Dye Dye knows me very well, I am worried about today's affairs, she saw it, and asked again and again, the little brother couldn't resist it, so he confessed it all!" ”

Xue Lang laughed, didn't mind at all, and said with a smile: "No wonder some people say that every woman is born Sherlock Holmes. Looking at Ah Lin's current shape, my brother has to persuade you that in front of your younger siblings, it's best to be honest and don't do anything sorry for your younger siblings, otherwise, you won't be able to hide it at all. ”

Jiang Lin's face was flushed with laughter, and he said stupidly: "Big brother, don't make fun of the younger brother, when the eldest brother marries the eldest sister-in-law in the future, the younger brother wants to see how the eldest brother is." ”

Xue Lang said: "It will not be as pitiful as you." ”

Jiang Lin said: "Little brother wait and see." ”

After finishing and asked, "By the way, big brother, what is Sherlock Holmes?" ”

"Uh...... Sherlock Holmes is a very good detective...... Hmm, catch fast? ”

What was a detective called in the Tang Dynasty?

Xue Lang frowned and thought for a while, until he got into the carriage and didn't come up with a reason when he got to the gate of the fang-

"Dare to ask, but the car of Changping County is driving?"

Coming out of the door, a soldier dressed as a sergeant of the Jinwuwei stepped forward respectfully to ask questions. The guard stopped the carriage and said, "Exactly." Dare to ask the guards what is the matter? ”

The soldier said: "The little one is waiting here for the prince of Changping County on the order of General Jin Wuwei, and he is ordered to pass the word. ”

"Please."

The soldier said: "Today, there was a case of Lu Jing, a son of the Lu family, offending the prince of Changping County, because the matter is not within the power and responsibility of Jin Wuwei, so Lu Jing and others have been handed over to the Chang'an Mansion. The Changping County Duke can go to the Chang'an Mansion to complain about the cause of the matter, so that the Chang'an Mansion Yin can take it. ”

Xue Lang said in the carriage: "Thank you, General, please bring a message to the guards and convey my gratitude." There are Lao Weijun. ”

"Don't dare, the little one must bring the words of the county prince."

With that, the soldiers retired. Xue Lang indifferently ordered in the carriage: "Let's go, turn to Chang'an Mansion." ”

"Whoa!"

The group went to the Chang'an Mansion.