Looking for a novel published more than ten years ago, I remember that the protagonist's name seems to be Li Qiang, but I can't remember it?

According to the information you provided, I found the following novel that may fit your description:

Legend of Gods: This novel tells the story of a teenager named Li Qiang who accidentally discovered a secret book in his student days and began to cultivate the strategy of gods' worship, which eventually became a story of gods' worship. It is mentioned in the novel that the protagonist is looking for ancient books, refining utensils, girlfriends, tattoos, immortal skills, refining utensils, various planets and so on, which is very similar to what you described.

Introduction to the novel:

Li Qiang, an ordinary college student, accidentally got a secret book to repair the truth. Since then, I have embarked on the road of repairing the truth.

Li Qiang's practice is to kill God. This method is powerful, but it is also cruel. Li Qiang paid an unimaginable price in the process of cultivation.

In the process of training, Li Qiang also encountered many difficulties and challenges. He was framed and hunted. But with strong will, he finally overcame all difficulties.

After practicing to a certain extent, Li Qiang started his own journey of cultivating truth. He traveled to countless planets and saw all kinds of strange sights.

During the trip, Li Qiang also made many friends. Together, they experienced the test of life and death and established a profound friendship.

Li Qiang finally became a killer, and he protected the world with his own strength.

Of course, the possibility of other novels cannot be completely ruled out. If you can provide more information, such as the publication time and author of the novel, I can help you judge again.

I hope this information can help you.