He was looking for a novel where the protagonist was a mercenary on Earth, and after his death, he traveled to another world and returned to Earth.

Reality Online. After the protagonist appeared in a colorful comet named Fancy, he obtained special abilities and heaven-defying skills. After transmigrating to another world, he collected equipment and killed monsters to drop equipment. Finally, he returned to Earth and found that many changes had taken place on Earth, including modern weapons.

The following two novels met the requirements: 1. In "Super Miracle," the protagonist Lu Hang returned to the days before the miracle descended on Earth after his death. He wanted to tell the higher-ups of the country the importance of the miracle, but he found that it was not easy. 2. In "I Have a Wormhole that Connects to Earth," the protagonist, Sota, obtained a space-time wormhole that connected to Earth. He began a magnificent story in another world, with Earth as his back. I hope you like this fairy's recommendation. Muah ~😗

This question was rather vague because the specific background of the protagonist's 8000 years of cultivation was not clear. However, if it was referring to the protagonist's 8000 years of cultivation after transmigrating to another world and then returning to Earth, then the name of this novel would be "The Evil Prince of Another World." This was a very popular online novel. It told the story of a young man, Zhang Chu, who had transmigrated to another world and became a powerful ruler through cultivation and combat. After returning to Earth, he embarked on a new journey and fought fiercely with his companions on Earth.

The male protagonist transmigrated from Earth to another world, became stronger, and then returned to Earth to search for his parents. After finding them, he also had a younger sister. When he returned to Earth, he had a goal. This plot was more common and usually involved the male protagonist's background, family background, parents 'storyline, and goals after returning to Earth. In some novels, after the male protagonist returned to Earth, he might embark on an adventure to find his parents or investigate the situation in the other world in order to reveal some truth. At the same time, he might also bring some specialties or items from the foreign world back to Earth to bring benefits to the people on Earth. In other novels, the male protagonist's search for his parents might involve his sister. She might become the medium between the male protagonist in the foreign world and Earth or have a special relationship with the male protagonist.

I recommend the book,"Revival of Spirit Qi, Return to Earth as the Richest Man". This book told the story of Jiang Feng returning to Earth after a hundred years of cultivation and discovering that the Earth had already recovered its spirit qi. The protagonist started his life anew on Earth and became the richest man on Earth with the help of his cultivation and the system. The plot matched the description. There was indeed a plot where the protagonist traveled from Earth to another world and returned to Earth. I hope you like this fairy's recommendation. Muah ~😗

I recommend the novel " The Light of Hope in the End of the World " to you! The main character traveled through another world and was reborn back to Earth. However, the difference was that she was no longer a woman who was seen as a burden. Instead, she was a story that carried light magic and dominated the darkness alone. I hope this novel meets your needs.

Some novels would have the protagonist return to Earth from another world to cultivate. The following are some of the common types of novels and works: 1 "Battle Through the Heavens": This is a very popular online fantasy novel that tells the story of a young man named Xiao Yan who trained to become a god in another world. Later, when he realized that there was a huge difference between his world and Earth, he decided to return to Earth and start his training journey again. [2. The Great Dominator: This is an online fantasy novel with the main character called Mu Chen.] In the other world, he became a powerful cultivator, but when he realized the difference between his world and Earth, he decided to return to Earth to find his own path. 3 " Full Time Expert ": This is an online game novel that tells the story of a retired professional player who returned to another world. He joined a professional team on Earth and started his gaming career again. 4 Douluo Continent: This is an online fantasy novel with the main character called Tang San. In the other world, he became a powerful cultivator, but when he realized the difference between his world and Earth, he decided to return to Earth to find a platform where he could display his abilities. These novels were all very popular works. The plots and characters were very attractive. One could choose to read them according to one's preferences.

I recommend to you "The Earth's Leading Party". This supernatural novel was written by the author, Bian Tuobo. It tells the story of an ordinary programmer, Chen Zong, who fought his entire life in another world after transmigrating. In the end, he brought the powerful female demon king back to Earth. The male protagonist brought the strength of the other world back to Earth. It could be said that he was extremely powerful. I hope you like this fairy's recommendation. Muah ~😗

The book "Earth's Guide Party" was an urban supernatural novel written by the author, Bian Tuoban. The protagonist, Chen Zong, accidentally traveled through another world and finally returned to Earth. However, he was not alone. He also brought a female demon king from another world. This novel told the story of how Chen Zong balanced his ordinary life on Earth with his responsibilities in the other world. I hope you like this fairy's recommendation. Muah ~😗

Return of the Immortal World.