A complete home is only called when there are children in the family, and the appearance of Xiao Yushuang has brought endless joy to the backyard of the Han family. She quickly became the center of attention of the Han family, crying, laughing, and pouting, all of which touched the hearts of many people.

Han Fei's love for the little girl is also incomprehensible, it can really be said that he is afraid of falling in the palm of his hand, and he is afraid of melting in his mouth, and he is not comfortable if he doesn't hold and tease it once a day. Xiao Yushuang has a nurse and a full-time girl to serve, and there are countless small toys bought at home by others, but he still feels that it is not enough, so he specially set aside a piece of land in the back garden, and he personally designed and built a playground, what slides, magic castles, seesaws, trampolines, etc., everything.

However, Xiao Yushuang is still too young, and even if she is interested in the novel playground, no one dares to let her in.

After Wang Ruolan's full moon, her body gradually recovered, but she was all about Xiao Yushuang, and she had no idea of going to the publishing house to be on duty. Now that the weather is hot, she mostly spends most of her time in the back garden enjoying the cool and reading books.

After eating at noon that day, Wang Ruolan was still lying on the bamboo couch in the stone pavilion in the back garden to read, Yin Xin sat next to her and shook her fan, but her eyes looked at the playground not far away.

"Madam, the young master's brain doesn't know what's going on, why are there so many strange ideas, this playground makes people very happy to watch, those little girls in the family revolve around every day, and they don't dare to go in to play."

Wang Ruolan glared at Yin Xin, and scolded with a smile: "How does the dead girl speak, what is a 'strange idea'?" Beware of the non-brother coming back to punish you! Fei Di is a genius who has even been praised by the saints, how can we women guess his thoughts? If the little girls in the family want to play, just let them in! ”

"But...... It was prepared by the young master for the eldest lady, and the little girls were all subordinates, how could they go in? ”

"It's okay, the big lady is still young, I'm afraid I will have to play next year, the playground is also vacant, let the little girls be familiar with it, you can be the playmate of the big lady in the future, our Han family has too few children......"

Wang Ruolan suddenly stared at Yin Xin's lower abdomen and said, "Yin Xin, you have been serving your non-brother a lot these days, why don't you react at all?" ”

Yin Xin blushed and sighed: "The slave and maid are blessed, and the stomach is not angry......"

"Go back and let my brother Fei check on you, get pregnant as soon as possible, and have a child before you can have hope!" Wang Ruolan stared at Yinxin, and said again: "This matter must be taken to heart, now that Sister Qin has not married, I will try to give you as many opportunities as possible to serve my brother, there will be more women in the future, and there will not be many opportunities like this!" ”

"Slave and maid, thank you, Madame!" Yin Xin immediately knelt on the ground, grateful.

"Get up, our master and servant are like sisters, and I will be towards you! You don't have to worry about the future, Sister Qin is a kind and generous person, and as long as you serve with all your heart, your brother will definitely not snub you! Wang Ruolan's face suddenly became serious, and then said: "Our Han family is a big mansion, and the achievements of non-brothers are limitless, there may be more women in the courtyard in the future, you must not be jealous, otherwise, I can't help you!" ”

"Slave and maid keep it in mind!"

"Sister Yinxin, Sister Yinxin......" A girl shouted as she ran.

Yin Xin was thinking about Wang Ruolan's words, and when she heard the voice, she reprimanded: "What is the blind at noon? ”

Yahuan ran to the side of the pavilion, first saluted Wang Ruolan, and then said hurriedly: "Sister Yinxin, the two girls who took care of the eldest lady fell asleep, and they happened to be seen by the young master when they came back, you go and take a look!" ”

Yin Xin said angrily: "How do I usually teach you? The caretaker lady actually fell asleep, and she should be punished! ”

Wang Ruolan sat up and asked, "Did the young master punish them?" ”

"The slave doesn't know...... When the slave saw the young master's cold face, the two maids were so frightened that they knelt on the ground, so they ran to call Sister Yinxin......"

"The young master is a benevolent person and will not punish his subordinates too much...... Yinxin, go check it out! ”

Yin Xin walked quickly to the room where Xiao Yushuang was resting, and saw that the two little maids were still kneeling aside, and Han Fei was holding a fan, with a calm face and not speaking.

Yin Xin is a girl in the room, her status is above all the girls, the girls in the backyard of the Han Mansion are usually managed by her, and she is also responsible for the girls who make mistakes. When she saw Han Fei looking very angry, she hurriedly knelt on the ground and said, "It's all slaves and maids who are not disciplined effectively, please punish the young master!" ”

Han Fei came back to his senses when he heard this, only to find that Yin Xin and the two girls were kneeling on the ground, and hurriedly said, "You all get up!" ”

He threw down the fan in his hand, walked up to the two girls, and said, "I know that you are very tired of taking care of the eldest lady, I will not punish you this time, pay attention in the future!" You don't have to keep it at the same time, you two take turns to rest, it's easier! ”

"The slave knows it's wrong! The slave must remember the young master's orders! ”

Han Fei nodded and walked out of the door, thinking about the idea just now in his mind. He was in the house just now, and he thought of an electric fan from the fan, and if he had an electric fan in the summer, he could sleep well at night.

The manufacturing principle of the electric fan is not complicated, with the craftsmanship of this era, coupled with his knowledge beyond the times, it is entirely possible to make a simple electric fan, the key is where does the electricity come from? If you want to have electricity, you have to make a generator, and this is not a big problem, and it is possible to make three-phase windings with copper wires and magnetic fields with magnets, which can also be done with the manufacturing process of this era.

However, the diesel engine that drives the generator is not so simple. It involves the performance of steel, the refining of diesel, etc., and the investment in R&D is bottomless, which is by no means possible with his existing capabilities.

He also thought of the hand-cranked generator, but then he thought about it, even if it costs manpower and material resources to get the hand-cranked generator and electric fan out, he has to specially invite a group of people to shake the generator to generate electricity, so as to drive the electric fan, as long as it stops shaking, there will be no power. In this way, the cost is too high, and it is better to save trouble with a fan.

"Young Master, beware of ......"

Han Fei heard the shouting and came back to his senses, only to find that he was only thinking about the problem and almost hit the water tank in the yard. Suddenly, he stared at the water tank, and a flash of inspiration occurred in his mind, as if he had thought of something.

"Young master, why are you so distracted that you almost hit the water tank?" Yin Xin ran to him and complained.

Han Fei replied casually: "Battery-"

"Ahh Yin Xin looked puzzled.

"The battery is ...... Let's talk about this later, you go to the study with me and sharpen the ink for me! ”

Han Fei turned back to the study, immediately sorted out his thoughts, and made a list of materials to prepare. In the end, he hesitated when listing the materials used to make the battery.

Although there are not many lead in the market to make battery electrodes, it can always be bought, and sulfuric acid solution can also be obtained by heating sulfur sulfur and dissolving it in water. Now the key is, what is the shell of the battery used for? The sulfuric acid solution is extremely corrosive, and general materials cannot be used at all. At the same time, it is also necessary to consider the sturdiness of the material, and it is not possible to use it if it is easy to break.

(End of chapter)