Transmigrated Into a Book in the 1970s: The Cannon Fodder Who Went to the Countryside Became a Bragging King

A transmigration tale set in a period novel, with fantasy woven into the transmigration, and a fantasy story full of surprises!!!

She transmigrates from the start, thinks she's a cannon-fodder character, but comes with a secret identity.

Her layered identities are wrapped in mystery!