It is a time-travel novel of the same period.
Ruan Xin traveled through time before she died. Ten years later, she became Princess Chang Xin of the Ji Kingdom, who was so favored that she married the Mongolian Kingdom.
Princess Changxin has a gentle temperament, but her loose heart is rebellious and has a cold temperament.
And what will happen if she gets to Mongolia and marries Prince Leda?