I Traveled Through the Lean Years and Became an Evil Mother-In-Law. I Have a Systematic Way to Get Rich.

Military Marriage Transmigration Novels

The female lead transmigrates back in time because the original body's head got bumped. The male lead absolutely adores her. At one point, he brings back something related to scientific research, written in English, and she recognizes it and tells him about it. He suspects she's a spy. Later, the heroine also gets down from a hillside...