Shen Xi, a modern doctor, is in a car accident and unexpectedly finds her soul transported to the thirty-sixth year of Kangxi, where she becomes Ulanara Shuyao, the primary wife of Fourth Prince Yinzhen. Faced with the gentle, virtuous reputation left by the original owner and her icy marriage to the prince, Shen Xi has no choice but to imitate the morning and evening rituals of an ancient noblewoman, only to repeatedly run into trouble because of her modern way of thinking. When caring for Honghui, who has smallpox, she uses modern disease-prevention knowledge to avert a crisis, prompting Yinzhen to see his wife in a new light for the first time.
It's a bit messy and I can't understand it