There were 10 categories of science fiction novels, the Interstellar Love Song Rankings, 300,000 to 500,000 words, and even a complete series.

Answer 1

I haven't been able to find all the novels that you want to match, but I've tried my best to find some related books.
Here are a few related novels I found for you:
1. [The Best of Youth] Author: Yun Hedao, Category: Reality, Family ethics, Finished, You can enjoy it at ease.
2. "My 2000" Author: Mr. Sanshi, Category: City, City Life, Completed, Can be enjoyed at ease
3. "The rest of my life is willing to meet with you in life and death." Author: Bai Beifei, Category: Reality, All Forms of the Human World. It's over. You can enjoy it at ease.
4. "The Interstellar Life of a Time Traveler Woman" Author: Glutinous Rice Noodles, Category: Sci-fi Space, Interstellar Love Song, Completed, You Can Enjoy It with Rest assured
5. "Spring of a Bachelor" Author: Depressed pipe, Category: Reality, Family ethics, Finished, can enjoy with ease

The following is a brief introduction of these novels:

1. The Best of Youth
This book tells the story of how young people with different shackles find a place to live in this era.
Zhao Xiaoxiao, an artistic young woman who loved fantasies, lived with the shackles of her father's death. She had a subtle relationship with her mother, who had become the wife of the chairman. Because she accidentally entered the peach trap, she met a strange man and started a love life entangled with love and hate.
Her male friend, Chen Heng, was a young man who had no house, no car, and no savings. He was affected by his previous relationship and could not completely get out of it. At the same time, he was lost in his personal work and life, following his fate step by step.
The two of them met a group of people with different personalities, interests, and family backgrounds. Their three views influenced each other and grew up together, but because of their different backgrounds, they headed for different futures.

2. My 2000
Cheng Feng, who was eager to get rid of the shackles of his original family, returned to the year 2000 in a car accident…
He had agreed to live for himself in this life, find the girl he liked, find a partner he trusted, earn enough money, graduate easily, get married smoothly, have children, and enjoy family happiness...
Wasn't this the wish and dream of an ordinary person?
However, as he walked, he inadvertently became the leader of everyone...

3. "I'm willing to make a life and death pact with you for the rest of my life."
Xu Tiannan, who had graduated from a wild chicken university, dreamed of becoming a hero. However, he did not expect that Yanbei City would be in financial crisis that year. Therefore, his dream of becoming a hero became a rich man. He accidentally returned to Mobei City and started selling graves.
Xu Tiannan fell in love with the company's executive, Xu Yina. He was not discouraged by the disparity in social status between the two parties. Instead, he rushed forward to the company's promotion.
On this path of advancement, Xu Tiannan had witnessed many families of the deceased. At the same time, he had also witnessed the glory and indifference of many people in the world.
Some couples ended up in tragedy because of poverty.
Some brothers killed each other because of inheritance issues;
Some families eventually embarked on a path of no return because of young and sick children.
Some people chose extreme methods of revenge because of unfair treatment.
Xu Tiannan was a chivalrous young man with the blood of lust flowing in his bones. He wanted to use his meager strength to help these people who were in trouble, but for some reason, every kind thing he did would go astray and turn into a ridiculous farce.
The choices people made in the face of money and life and death showed the human nature of that era.

4. "The Interstellar Life of a Time Traveler Girl"
This was the story of a transmigrator girl who brought her golden finger to the interstellar era where there were more men than women ~

Finished dungeon, rest assured to enter the pit ~

P.S.: If you don't like it, please be careful. If you don't like it, please click the cross on the top right corner. You can raise your opinions, but the author's tolerance is low and will not accept verbal attacks. New book,"Guide to the Goddess of the Stars"

5. Spring of a Bachelor
Before the age of 28, he had never thought about marrying a wife.
After the age of 28, he had not found a suitable partner.
Han Zhong was now a 36-year-old bachelor.
For rich people, 36 years old wasn't scary. What was scary was that Han Zhong didn't have much money.

These works all have good reputations for your reference.