I recommend some novels where the female protagonist transmigrated back to the modern world with the system. Among them, the female protagonist can use the system to return to the past and successfully defeat her former opponent and capture the CEO male protagonist.

Answer 1

" The Strongest Overlord Rebirth System " is a fantasy romance novel written by the author Yuan Wu. The general plot of this novel is:

In her previous life, she had transmigrated and became the Mary Sue transmigrated girl that everyone loved. She was in a remote village but had an invincible background. She was extremely ordinary inside and out, but Prince Charming fell head over heels for her. She even had the invincible Golden Finger Overlord System. Whatever talent, divine weapon, the system gave it all to her for free. The invincible female protagonist halo shone on her head, and she could have anything she wanted... However, all the halos disappeared overnight. Her loved ones were her enemies, and her lover had a new lover. Her soul was burned and she was better off dead than alive. She thought that she would die for sure, but she was reborn at the beginning of her transmigration and everything started anew. She would not let go of her enemies, but in the process of revenge, she realized that something was unusual…She had exposed the tip of the iceberg of the great conspiracy. Since she was lucky enough to know the truth, she would not sit still and wait for death. Losing the female lead halo had restored her rationality. It was still unknown who would win! Also, what was the intention of the person who had only caught a glimpse of her in her previous life to keep wandering in front of her in this life?
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" After Rebirth, I Rely on the System to Become Rich " was an ancient romance novel written by the author, Foraging Swallow. The general plot of this novel was:

" Goldfinger "," Farming and Business "," Scumbag "," System Style ", and " Easy and Cool Writing ". After the car accident, when she opened her eyes again, she had become a poor little girl with no family, no parents, no rice to cook for her, no uncles, no unkind parents, and mean grandparents. However, she held the plane's trading space and possessed the spiritual liquid that could cure all poisons and give birth to all things. She could exchange for a storage ring that was 100 square meters in storage space at will. She relied on her golden finger to call the shots in the business world and was as rich as a country. Even the high-ranking and powerful people treated her with great courtesy. She was conferred the title of princess and had endless glory. However, this god-like general was so devoted to her that he became jealous in an instant. Although there was a second male lead in this story, the female lead firmly liked the male lead! Physical and mental health!
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" The Supporting Female Character Is A Little Panic " was a modern romance novel written by the author, Yun Xianyun. The general plot of the novel was:

One day, I traveled through time and became a female supporting character in a book.
She wanted to avoid the male lead and supporting actor, but no one would let her go.
Since she couldn't avoid it, she would fight it head-on. She was someone with a cheat anyway.
But...
Wasn't this the mysterious big boss in the book? Why is he staring at me?
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" The Strongest Female CEO " was an urban supernatural novel written by the reincarnated author. The general plot of this novel was:

After returning from abroad, he married a female CEO who was as cold as ice due to his family connections.
They had never met, but they had become husband and wife. Their married life was unusually cold.
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" The CEO's Wife Has Space for Rebirth " was a modern romance novel written by the author, Cuichi Xixue. The general plot of this novel was:

In her previous life, she was an orphan who could be bullied by anyone. She was honest, dull, ugly, and the world was difficult. She ended up with a tragic death. In this life, she was still born as a commoner, but she had amazing looks and had to raise her mother and sister. His life was not good, and he was suppressed everywhere. But what was with this extra space? Could it be that she had been reborn as the female lead? Wait, why did one of the CEOs have a strange look in his eyes? He kept blinking at her? "Didn't you see me flirting with you?" No, are your eyes twitching?"
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Super System: The Tough Woman of the City was a modern romance novel written by the author, Xiaoyao Youyou. The general plot of this novel was:

One day, a pie suddenly fell from the sky. Jing Sa was so lucky that he actually became the heir of an aristocratic family.
It made others envious, but it also took her life.
She had never wanted any blood relatives or direct descendants.
When she woke up again, her eyes were filled with anger. The power system had brought her a whole new life.
However, being a newbie with superpowers was also a very tough and frustrating thing.
After living the life of a rookie, that was called spring.
E, D, C, B, A, S, SSS, X.
Bloodthirsty Evolution, Duplication, Imprisonment…
All of the new abilities were dazzling.
Since the heavens had given her a second chance at life, she would live a wonderful life.
In this life, she wanted to live a brand new life. She wanted to see with her own eyes those people who had hurt her.
One by one, they screamed and wailed under her feet.
☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆
Sixteen years old, the age when she had just entered high school.
However, she was already a visiting professor at the medical university.
A silver needle, a scalpel, both Chinese and Western medicine.
She didn't know much about stone gambling, but it didn't matter. Her luck had always been good.
With her slender hands, she had built an empire with hundreds of billions of dollars in wealth.
☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆
Thus, a new legend of the modern city was written for her.
Therefore, everyone knew that Jing Sa was a legend, and a legend was Jing Sa.
She said,"As a woman, you either have to endure or be cruel. Alright, I choose the latter!"
"Wherever there are women, there will be battlefields, and I am the uncrowned king!"
She said," I'm not a noble person, nor am I a savior. I only work hard for myself and the people I care about!"
She said,"It's okay to provoke me. I don't mind stomping on you!" 
☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆
I recommend my ending article,"Miss Useless"
I recommend my ending article, Phantom and Asura Transformation.
I recommend my own serial, Exalted Goddess.
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[Announcement]
1. The story in this article is purely fictional. If there is any similarity, it is purely coincidental. He wanted the content to be exciting, not overly detailed. Please look at the article, don't be too serious, if you have any comments or suggestions, please put forward tactfully. The readers wanted to have fun while the authors wanted to be happy.
2. All the information about stone gambling and special abilities in this article were written from the information collected on the Internet. There are many exaggerations and shortcomings. If you meet an expert, please laugh it off.
3. If you don't like it, please click on the small cross in the upper right corner. The author has a heart of glass and accepts all opinions and suggestions based on respect and kindness. However, any comments that are insulting or personal attacks will be deleted and banned. Thank you.

Finally, I wish everyone a happy reading!
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" The Crazy Son-in-Law of a Female CEO " was a novel about urban life written by a god-level author. The general plot of this novel was:

Becoming the son-in-law of a beautiful president…
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" The Rebirth of the Witch of Quick Wear " was a sci-fi space-time travel novel written by Si Xuan. The general plot of this novel was:

The demoness who had been suppressed for a thousand years had appeared once again, and all the worlds had been turned upside down by her.
The System replied,[Host, do you want to recover your powerful magic power?] Do you want to turn the clouds and rain with a flip of your hand again?"
" System?" Huang Tian looked at the system who was smiling obsequiously in her mind and sneered. What is it?"
[Lady Witch, I'm not your cheat. You're my cheat.] The system said obsequiously.
"Yes!" These words are in line with my wishes, so I'll allow you to stay!"
System: Oh yeah! It was really lucky to have such an awesome host. Would the days of crushing other systems be far away?
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" The Enemies of the Book Have Goldfingers " was a sci-fi space-time travel novel written by the author, Senior Nan Jae. The general plot of this novel was:

Su Luodai entered a book called " The Female Lead's Cheat ". Every female lead had their own cheat system, and there were piles of cheat cards. However, she was dressed as the former female lead who had been robbed of her halo in every story.
[Shengshi Beauty System: You must absorb the negative energy of the previous female lead of the delicate bag to become beautiful…Awoo!] What was this woman doing? What did this full of positive energy mean?
[Wealth System: You must absorb the luck value of the female protagonist of the Koi Life to be rich enough to rival a country…knock!] Stop! How did that spendthrift rich third generation suddenly become so unlucky?
[Academic Genius System: You have to absorb the intelligence points of a silly and sweet academic genius in order to easily become an academic genius and walk to the top of your life…Wait!] What was she doing now? Then what was that 3+5 book?
All the systems were speechless. Didn't they say they were cannon fodder? Why couldn't he defeat her?
All the female protagonists thought,"Sob, sob, sob, Su Luodai is the devil!"
This book was also known as " The Cheat of the Female Lead's Cannon Fodder " and " The whole world has a cheat, but I don't have one ".
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" Noble Family's Favor: President Li, Please Be Gentle " was a modern romance novel written by the author, Qingqing Zijin. The general plot of this novel was:

A year ago, she was abandoned by her father, who ran away with the money. A year later, she stood beside him in her best attire and transformed into a new female entrepreneur. He was the president of a financial group and the eldest son of a high-ranking family. His status was noble and his assets were over 100 million. He seemed gentle but was actually strong and cunning. He had used a contract to control her life in a cunning and forceful manner.