Recommend the book "The Days We Lived Together"

A failed chemistry experiment allowed the experimenter Gong Hao’s soul to cross the realm and become a civilian teenager Xiu Yierer.

Unfortunately, he was sold to the island of nightmares, the Empire’s secret alchemy experimental base, as the lowest-level servant and experimental material that could be killed at any time.

Fortunately, he still has a little time to change his destiny: he desperately learns all kinds of knowledge and skills, learns and transforms the lost ancient alchemy, and becomes the strongest all-round alchemist who is proficient in magic and martial arts.
 
Step the dragon under your feet with magic martial arts, and let the demon tremble in front of my puppet army!