After rebirth, I became a national teacher

She was born as a slave, and for the sake of her two children, she had to try her best to please her mistress. But she didn't expect that she would be framed by her mistress and beaten to death. After rebirth, she traveled to the world of cultivation and practiced hard for decades. During a thunderstorm, she was struck and traveled back to her original world. After rebirth, she wanted revenge on everyone...