After returning home, Wu Xin first checked the sulfuric acid and nitric acid problems mentioned by Li Li.

Sulfuric acid is easy to solve. The main raw material of sulfuric acid is pyrite, which is available in Lingchuan.

The sulfur in pyrite can be used to make sulfuric acid and black gunpowder, and the remaining slag can also be used to make iron and steel. Although the treatment cost is high, this is not a problem after the end of the world. This is really a three-purpose use for one or two mines.

As for nitric acid, unless there are nitrogen-containing ores such as saltpeter ore, nitric acid raw materials can only be prepared through the synthesis of ammonia.

Although it is troublesome, the benefits are not lacking. First, agriculture will not lack fertilizers, and second, nitric acid will also be used to prepare potassium nitrate in black gunpowder.

However, Wu Xin looked at a photo of a synthetic ammonia fertilizer factory and her head was too big.

Not to mention the area, he was dazzled by all kinds of metal cans and pipes. It was too complicated! However, he saw the introduction of the factory: a daily output of 750 tons!

"The annual output is 270,000 tons, no wonder it is so large!" Wu Xin breathed a sigh of relief. The demand for the base after the end of the world could not be used so much. The daily production capacity is more than ten tons, so the volume of the equipment will definitely not be too large, and there is also Meilingchuan, which is needed for the synthetic ammonia factory.

In this way, there is a solution to the problems of sulfuric acid and nitric acid, and Wu Xin is much more at ease. Seeing that it was already dark, he got up and moved for a while and came to the balcony for training.

Wu Xin looked at the opposite side habitually and saw Liu Xi, who was also training. The two sides waved their hands simply without too much communication.

Of course, this is not that Wu Xin doesn't want to communicate with Liu Xi, but that although they know each other now, they are not very familiar with each other. Liu Xi is also a person who hates others' entanglements. Wu Xin can only endure it, but her eyes are always secretly looking at her.

"No wonder Xiaoxi has such a good figure in the future. So he has trained it!" Wu Xin yyed.

Although Liu Xi exercises frequently, the purpose is not to accumulate muscles and turn into Barbie, but to improve his explosive power and durability. It will not only not affect the beauty of the body's curves, but will make his curves more prominent.

Liu Xi is only seventeen years old and has not yet developed well, and she looks a little thin. But when she matures, her figure is really bulging and tilted, and the perfect combination of strength and sexiness. In addition, she is very beautiful, and in the end of the world where there are more men and fewer women, she can attract groups of little bees!

Thinking of this, Wu Xin practiced harder. Although such a wife is excellent, she has a lot of trouble and her abilities have been enhanced!

At this time, Liu Xi was a little tired of practicing, so she leaned against the balcony to rest for a while, and her eyes naturally fell on Wu Xin opposite her.

Of course, Liu Xi has also paid attention to Wu Xin's side these days. Through Wu Xin's performance in the police station that day and the chats between the old men and the aunts in the community, he probably knew that Wu Xin was a rich second-generation rich man, but he didn't hate him.

Although Wu Xin was suspected of teasing her when she first met her, the two looked at each other twice, but when the other saw her, they were not as stunning or aggressive as many men. Instead, it made her feel a great sadness after losing her loved one, which inexplicably touched her heart.

Because she had seen such a look from her father, but the object of her attention was her mother...

When Liu Xi's mother was still alive, the two years after her father retired was the happiest time she felt. Although the family was not rich at that time, her parents were willing to live in harmony, and even often ignored the existence of her daughter, which made her feel a little dissatisfied that she was just an accessory of their love.

Although she occasionally gets angry and attracts her parents' attention, she is very eager for her parents' love. Her understanding and enlightenment of love is not a girl idol drama, but a teaching by her parents.

"I want to have a love like my parents in the future!"

This is a beautiful wish that a girl has developed from the deep love infection between her parents.

But when such a wish is finally presented with the tragedy of being separated from her father forever by her mother's death, this wish becomes her greatest regret.

Especially when her mother died, her father's indescribable grief also deeply infected her. The tragedy of her parents' love became a knot that she could not untie... Then, Wu Xin appeared.

He looked at her with the look he used to look at her when his father looked at her mother!

Whenever she thinks of Wu Xin's eyes, she feels like she has an illusion. She has put herself into the role of her mother, and Wu Xin is her husband. Her sad and deep eyes always touch her inexplicably. There is a voice deep in her heart that seems to be shouting: "Don't repeat such a tragedy!"

Since meeting Wu Xin, Liu Xi has always been in private and can't help but fantasize about how she and Wu Xin should avoid the tragedy of her parents, and go to the end perfectly to make up for the huge regret in her heart.

And such fantasies made her unconsciously pay attention to Wu Xin.

Wu Xin's help to her at the police station and her father's recent boredom with Wu Xin made her vaguely notice Wu Xin's intention, but this time she did not resist in her heart, but instead had a little expectation...

Just when Liu Xi watched Wu Xin fall into her fantasy, Wu Xin, who was under her attention, began to get nervous. She kept exercising in a training movement for a while until her body couldn't bear it and screamed.

Wu Xin's scream made Liu Xi come back to her senses, and then she was amused with a "pop" sound.

Seeing Wu Xin standing up and rubbing her waist and looking at her embarrassedly, she held her smile and said to Wu Xin with a red face: "Don't you know how to change your movements!"

"Forgot, hehe..." Wu Xin scratched her head embarrassedly and smiled foolishly. She suddenly felt shy as if she had first seen Liu Xi in her previous life. The girlish style that Liu Xi showed when she covered her mouth and laughed secretly made Wu Xin stunned. He had never seen Liu Xi like this before...

"Xiaoxi!!"

A stern voice came. Liu Xi turned around and saw that it was his father. She stuck out her tongue cutely, waved at Wu Xin and slipped away.

Liu Zheng looked at Wu Xin who was still waving her hands across the street, and felt a stream of blood rushing into the sky.

Bang! Clang!!

Liu Zheng closed the sliding door of the balcony with force, and the glass on the door was shattered directly, and the door was a little deformed.

"What's wrong with Liu Zheng? You're so angry with Xiaoxi? Don't beat me, Xiaoxi is so obedient..." An old lady on the upper floor stretched out her head and shouted at Liu Zheng's house.

"Liu Zheng, you must dare to beat Xiaoxi. I will go to the neighborhood committee tomorrow to sue you..." an aunt downstairs shouted.

"I didn't hit, it was because I accidentally broke the door!" Listening to the neighbors' condemnation, Liu Zheng explained impatiently.

"It's okay, my dad didn't hit me." Liu Xi had to explain.

Wu Xin was a little shocked when she saw this scene. Is Xiaoxi so popular?

Just when Wu Xin was surprised, the old lady on the opposite side smiled at Wu Xin and waved her hand, indicating that she would let him go into the house. It turned out that he and Liu Xi were peeped just now, but Wu Xin still grinned and gave the old lady a thumbs up.

But suddenly, Wu Xin felt a chill on her back and subconsciously looked at the Liu family. She saw Liu Zheng standing sideways in the living room, staring at him with his eyes squinted, and then turned off the lights with a click.

"Damn, my father-in-law is serious!" Liu Zheng's eyes just now reminded Wu Xin of the look of Liu Zheng looking at the enemy in the end of the world. Anyone who has been seen like this is basically not alive!

Looking at the dark living room of the Liu family opposite, Wu Xin felt that there was something extremely terrifying creature staring at her coldly in the darkness.

He was shocked and hurried into the house. He locked all the lockable places in the house on the three floors inside and three floors, and then hid in his quilt and shivered...
Chapter completed!