It was already April 20th and the weather began to get hotter.

Today is the 14th birthday of the young man. If it were not during the filial piety period, the 14th birthday would have to be a ritual.

Zhang's mother still followed the process of the hairpin and gave the hairpin to the young man. The young man changed into a bean-green long-sleeved deep dress, paired with a moon-white satin dress, tied up a tassel bun, inserted a silver hairpin, hairpin, and hairpin, and put a delicate and small silver bracelet on his hand. This dressing added a bit of the graceful and elegant look of the girl.

At noon, Liu's mother, who was beside the second wife, came over and brought the second wife to the birthday gift for the young girl - a red gold woven plum blossom gold hairpin and a phoenix-tail golden hairpin.

The second wife also asked Liu's mother to bring 400 taels of silver notes, saying that Xianghezhai made a net profit of 2,000 taels in less than a month last month, and the second wife gave Xianghezhai 20% of the shares to the young master.

Now Xianghezhai’s dim sum has become popular in the capital. If someone has a banquet, it would be very respectful if Xianghezhai’s dim sum is placed on the table, and the banquet level has suddenly improved a lot.

Youzi pushed the silver note box to Liu's mother, "Mom Liu thanked my second aunt for my sake, but Youzi couldn't accept it."

Liu's mother said, "When I came, my wife said, "Miss Cousin just hold it. If Xianghezhai wants to do it for a long time, she will still rely on Miss Cousin and Miss Qingzhi in the future." As she said that, her mother took another 50 taels of silver to Qingzhi, "This is what the wife gave to Miss Qingzhi."

Qingzhi answered generously, "Mom thanked the second wife for me."

Youzi only felt that the second wife was short of money, so she started to help her from the snack shop, but she didn't expect that she was so generous. Youzi said, "Even if there is no shares, I will help my second aunt. I will accept these four hundred taels and treat them as daily use for a long time. I also asked my mother to convey it, and my aunt should not mention the shares again."

After vegetarian meal, Liu's mother returned.

When Young-san returned to her room to read a book, she read a book called "The Book of Sun Tzu".

The famous "Chicken and Rabbit Cage" is proposed in this book: There are pheasants and rabbits in the same cage, with thirty-five heads on top and ninety-four feet on bottom. What are the pheasants and rabbits on top?

The answer is: Twenty-three pheasants and twelve rabbits.

The technique says: Place the top thirty-five heads, place the bottom 94 feet. Half the foot, get forty-seven, reduce the amount, and then order it, divide the upper three into the lower three, the upper five into the lower five, one below one below, two below two above two, then get it. The technique also says: Place the head above, place the foot below, half of the foot, remove the foot from the head, and remove the head with the foot, and get it.

Youhua thought that the second algorithm was relatively simple and easy to understand, which was to let all chickens and rabbits raise their legs, and the remaining 24 legs were all rabbits. Each rabbit had two legs at this time, and 12 rabbits were found and 23 chickens were found.

Youzi used the method of solving equations to solve this problem. You almost didn't have to go around the brain like that. Just find equal relationships to solve equations.

There is another "thing that does not know the number" that is actually the "remaining theorem": there are things now, but they do not know the number. Count three and three, and there are two left; count five and five, and there are three left; count seven and seven, and there are two left. Question: How much is the object? The answer is: twenty-three.

The wisdom of the ancients is really amazing. The remainder theorem is a very difficult problem in modern times.

There is also a book "Nine Chapters of Arithmetic", which has been read by Youhua. The version is still in a relatively preliminary stage, and has not been revised and supplemented for more than a thousand years in later generations. Some concepts and theories have already appeared in the prototype but have not been penetrated. However, these theories have surprised Youhua. Just like the algorithm of circular area and the "Pythagorean theorem", this book has a preliminary explanation.

Youzi took a brush to draw and draw, did the above questions, compared and analyzed the similarities and shortcomings of these theorems with later generations, and felt like doing math problems in high school. Youzizi learned mathematics well when she was in school. Math always gave her great satisfaction, and she even won awards in the Olympics.

At this time, Qingzhi came in and saw the manuscript paper drawn by Youhua on the table, saying, "Where is the lady drawing the talisman again?"

Youzi rolled her eyes wildly, twisted her ears and said angrily, "This is a numerical symbol created by your lady, not a ghost painting talisman!"

Qingzhi begged for mercy, "Miss, please spare me, I won't say anything. Xiaowu is still waiting outside, saying that the old man asked the lady to go to the thatched cottage."

Youzi let go, "Go."

Since he saved Mr. Han from childhood, Xiao Wu has been respectful and admiring Youch. If you want to use one word to describe it, it is "dog legs".

Xiao Wu told jokes all the way to make Youhua happy and headed towards the thatched cottage. Naturally, Qingzhi holding snacks were followed by two bodyguards and Qingjueci.

Old Master Han was painting in his study, drawing a picture of a spring scenery in the mountains. He wanted to write a poem but had not yet come up with a suitable one.

Seeing that Youhua came, he handed her a pen and said, "He Yat-tou, come and write inscriptions." Old Master Han felt that no matter how the little girl wrote, she was always elegant.

Youhua asked with a smile, "Can I write anything?"

Old Master Han smiled and said, "Of course, just write it casually."

Youhua looked at the painting, pondered for a while, and took the pen and made a few strokes:

He is quite good at speaking at middle age, but his family is green in the mountains in the late family.

Whenever you come, you will be alone, and you will know the success of things.

Walk to the end of the water and sit and watch the clouds rise.

It happened to be a while when Lin Suo was chatting and laughing without expecting to return.

This is "Zhongnan Bieye" written by Wang Wei in his later years. Wang Wei became the right chief of the Shangshu. Due to repeated political changes, he had already seen the difficulties of his career and wanted to transcend this troubled world. When he was middle-aged, he lived in seclusion in Zhongnan Mountain to eat vegetarian food and worship Buddha, leisurely and freely, quite transcendent.

Youhua wrote running script, and she felt that running script could better express the artistic conception of this poem.

Old Master Han smiled and looked at the front of the desk for a long time. He pleaded with his hands and said, "Miscellaneous! Wonderful! The poem is written well, and the words are written well!"

Youzi laughed and said, "Old man, don't blame me for writing randomly."

Old Master Han picked up the drawing paper and held it in front of him and read it repeatedly, "Walking to the end of the water, sitting and watching the clouds rise, it is exquisite and wonderful! The little girl actually has such good literary talent and good writing!" As he said, he said, "Is it you who copied the scriptures in the side hall of Jingci Temple?"

Youhua nodded, "How did the old man know?"

Old Master Han took out a page of scripture from a box in Duobao Pavilion, "See if you left it?"

Youhua nodded, "The old man has good eyesight." He used small regular script to copy scriptures and running script to write poems. The old man could actually tell that it was written by one person.

Mr. Han said, "Although the fonts are different, the character is the same."

Old Master Han stopped paying attention to the poem and repeatedly recited the poem, as if he was crazy.

Qingzhi whispered to Xiaowu, "Your old man is not stupid, right?"

Xiaowu said unhappy, "The old man is happy to meet Haoshu."
Chapter completed!