The Seventies: After Marrying in the Countryside, I Join the Army

Set in an alternate world (the author isn't good at writing synopses)

When Xu Yuqing's third older brother learns that his younger sister has gone to the countryside, he wants to introduce her to one of his comrades. After completing a mission, he secretly takes his comrade to visit her. Xu Yuqing, a sweet and charming girl, thinks Gu Zhengyun is very handsome. Since her third brother is also single, she tries to set him up with her friend.