I Have a Celestial Space Left Behind

She was originally a medical school master's student in the 21st century, an orphan. When she woke up, the world had suddenly changed. Gray walls, mud houses—she'd accidentally arrived in the 1970s and had no choice but to accept her fate. "Hey, big shot, stop following me around!" "Hey, big shot, why are you always hanging around in front of me?" "Hey, big shot, stop trying to seduce me with your abs!" "Hey, big shot, I'm looking for a lifelong, one-on-one relationship." Xia Jingchuan: "What a coincidence, me too." "I swear in the name of the nation, I will be loyal to the nation and loyal to you for the rest of my life." The female lead is strong, has unlimited resources, and few awful characters. The male lead appears relatively late.