Fujin is not good

The modern female diplomat travels back to the ancient times, trying her best to save the feudal edifice from falling.However, at the beginning, it was just a little cabbage whose father didn't love his mother and his stepmother didn't love him. He married a county king and was made a mistress.This ultimate great cause of turning the tide seems a bit far away... The heroine who is very happy at first glance X the arrogant hero who looks good but has a dark belly.The male and female protagonists are "double cheap".