My Grandma's Childhood Betrothal

Any Period Novels Where the Female Lead Is a Retired Military Officer, But Hasn't Actually Retired?

The female lead is powerful and returns to the production brigade. She wasn’t discharged from the military; she’s actually there on a mission. The male lead is either an educated youth, someone sent to live in a cowshed, or someone raised by the whole village. He also seems gentle on the surface but is scheming underneath.