There were many novels that described the protagonist becoming stronger and stronger through constant combat and training after being defeated by the enemy. Here are a few such novels:
"Fight Through the Heavens"-Tian Can Tu Dou: This is a very popular online fantasy novel. The main character Xiao Yan was a weak youth from the Dou Qi continent at the beginning. However, he experienced many difficult battles and tests before finally becoming a powerful Dou Di.
" The Peak of Martial Arts "-Momo: This is an online fantasy novel. The protagonist Momo has superpowers from the beginning, but he is an ordinary person without a strong background and resources. He had gone through a lot of tough training and battles and finally became a powerful martial artist.
3 " Lord Snow Eagle "-Outsider: This is a modern fantasy novel. The main character, Lin Xuan, was a weak student at the beginning, but he had a strong willpower and an indomitable spirit. Through continuous battle and hard work, he finally became a powerful lord.
All of these novels had one thing in common, which was that the protagonists became stronger and stronger through continuous efforts and battles after suffering setbacks and blows.
There were many novels that described the protagonist obtaining alien technology, such as the " Three-Body " series, the " Galaxy Empire " series, and so on. The protagonists of these novels often faced huge challenges and needed to use alien technology to improve their abilities and constantly explore the secrets of alien civilizations. These novels often involved alien creatures, interstellar travel, cosmic physics, and other aspects of knowledge that shocked and curious readers.
I'm not sure which novel you're referring to. However, if you are referring to the " Three-Body " series of novels, you can refer to the following plot:
In the " Three-Body Problem " series, Chinese scientist Ye Wenjie accidentally discovered a technology that could control the power of the universe while researching alien technology and brought it back to China. This technology had greatly improved China's scientific and technological level, making it a powerful country in science and technology. However, due to the terrifying power of this technology, Ye Wenjie and others had to hide it and have been trying to find a way to limit its use.
Another option is to start from the kidnapper's perspective. Show their planning and motives for kidnapping Allen. It gives a different view and hooks the reader as they wonder why this is happening to Allen.
After the protagonist obtained the alien technology, he established a country on Earth with powerful technology. He used alien technology to develop many advanced weapons and equipment to help the Earth army defeat the foreign invaders.
The protagonist also used alien technology to build a science and technology museum to display the various technologies discovered by the Earthlings in the alien civilization to show the strength of Earth's technology to the outside world.
As time passed, the protagonist gradually obtained more and more alien technology, and his country became more and more powerful. He began to explore the alien world in search of more alien technological resources.
In his exploration, the protagonist encountered some difficulties and challenges, but he always insisted on his dream and tried to make his country stronger. In the end, the protagonist successfully explored more alien technology and brought it back to Earth to share with the people of the world.
The protagonist became a great leader and his country became a prosperous and technologically advanced country.
Another theme is overcoming prejudice. In many fics, others underestimate Sakura, but as she gets stronger, she shatters those low expectations. This can include proving herself to male characters who initially didn't take her seriously.
Another character could be Astrid. In the fanfiction, she might play a role in Hiccup's journey to get stronger. She could be his training partner or offer advice based on her own skills and experiences. Also, there might be new characters introduced, like an old dragon trainer who has a lot of wisdom to share with Hiccup.