I want to find a fantasy novel that I once read in my childhood to satisfy my regrets.

I forgot the name of the book, but I still remember some of the plot...
The first part of the book is about the modern world. The main character has a master and has achieved success in his cultivation. He even brought his girlfriend along on the path of cultivation. After that, he subdued his senior brother who had betrayed his master. The senior brother turned into a soul and was given to the main character. Then, he and his girlfriend transmigrated to another world. However, the two of them were separated. His girlfriend should have become a princess. I don't know what happened after that. I didn't read it, but I only read it once. I still remember it 7.8 years later. In order to finish reading it, I ask for your help.

Answer 1

"The Return of the Reborn Immortal Master" is a Xianxia and modern cultivation novel written by the author, a young student named Qiaocunzi. The general plot of this novel is:

A wisp of the Celestial Venerable Chu Tian's soul returned to his youth on Earth. In this life, he defeated fate with an invincible posture and made up for the regrets of his previous life. The return of the Immortal Venerable, only I am invincible…
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"Xiao Xianzhang, Wait For Me" was a Xianxia novel written by Liu Adai. The general plot of this novel was:

Mu Wuxia's parents died when she was young. When she grew up, her demon bloodline was activated, and the Demon Lord seal from 10,000 years ago began to break.
Step by step, he led her to discover a bigger secret, and even he was just a chess piece in it.
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"The Story of the Desolation" was a Xianxia, mythical, and cultivation novel written by a pen name that the author had missed. The general plot of this novel was:

Chaos was just created, the world was just formed, all things were enlightened, and hundreds of races stood in the forest, each occupying a region. Later, it was rumored that the gods and devils of Kunlun established their capital and were called gods. They could live forever and reach the heavens. They could enslave hundreds of races and establish the capital of immortals to become the ruler of heaven and earth. This period of time was called the Pre-Desolate Era.
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"Xian Tian Bu Xian" was a fantasy romance novel written by the author Jiang Zi. The general plot of this novel was:

This was the story of a cute girl who broke into the immortal world…
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"Searching for Immortals in Troubled Times" was a fantasy immortal cultivation novel written by the author, Wu Ruguo. The general plot of this novel was:

How did Gu Kunlun disappear?
What was the reason for the appearance of the Nine Heavens?
What exactly was the divine persona of a god?
What was the secret of the Mount Shu Sword Sect's sword that could conquer the world?
How was the path of becoming an immortal severed?
The Immortal Seeking Record in Troubled Times brings you into this lost period of time.
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"I Really Didn't Cultivate" was a fantasy novel written by the author with a black pen tip. The general plot of this novel was:

Revival of Spirit Qi? One day, extraordinary people would appear one after another. The Blue Star, which had never had any myths, seemed to welcome a magnificent mythological world. Countless people cheered for it. The young Gao Yang, fortunately or unfortunately, was the first batch to step into this strange new world. The illusory and grotesque Dream Spirit World, the perilous Mind World, and the strange and indescribable Myriad Spirit World. Let's see how the young man will walk the path of a bizarre immortal...
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"Xianben Indifference" was a fantasy romance novel written by the author Yue Lao. The general plot of this novel was:

After his rebirth, he realized that his original perfect body was missing a corner, and it seemed to be a very important part of his memory. Therefore, he calmly prepared to retrieve the memory fragments and embarked on a path of no return that was "favored" by a certain proud immortal.
o(* Greatest ▽ Greatest *)o ~~ It's not easy to write a new book. Please collect, reward, and review it!
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My Different Cultivation World was a fantasy immortal cultivation novel written by the author Xianlingzi. The general plot of the novel was:

"Master, you want to learn how to cultivate from me."
A cute and cute little loli said.
"Shut up! When you recover to the original level, just you wait!"
the young man said fiercely.
"Master, what do you want? You can't…"
"You're a legal loli. That's great!"
Step by step, the young man recovered the memories of his previous life and saved thousands of universes.
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"Divergent Paths to Immortal Fall" was a Xianxia novel written by the author, Huo Wu Liu Xing. The general plot of this novel was:

She, a little girl who grew up in an orphanage with no one to rely on, had somehow transmigrated to the cultivation world. More importantly, she was only five years old? Don't be afraid, I have a magical space. If you can't beat me, run. If you can't run, hide. In addition to the supreme-grade spirit root, who could compete with him? Hehe, you, stop right there!
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The book "Seeking the Way of the Immortal" was a fantasy immortal cultivation novel written by the author Huan Yu. The general plot of this novel was:

The path of immortality was rugged, and all kinds of tempering finally yielded positive results. Demon body, violent spiritual energy, useless pill materials, I want everything that others don't dare to try. This was the story of a young man from a poor family who overcame all difficulties to become an immortal. Book friend group, Immortal Seeking 176876768.