After a Science PhD Transmigrates, the Entire Court Panics

From the start, it’s hell, but he has to grind his way to immortality!

He transmigrates into the body of a poor family’s live-in son-in-law, only to be rejected, humiliated, and trampled underfoot.

His mother is gravely ill, his family has nothing, and he has no chance to turn things around?

No!

He aced math, physics, and chemistry, and knows how to make gunpowder, alcohol, and glass.

Can you ancient people really outsmart a modern science student?