It's a Showdown, the Country Girl Is Actually a Living Ancestor

Sang Ning was originally the eldest daughter of a famous family in ancient times. After traveling to modern times, her family disliked her for her unruly background in the countryside. However, being born into a famous family, what she is most proficient in is the etiquette of wealthy families. Within a month, everyone in the Nan family was horrified to discover that this country girl was more professional than an etiquette teacher in how she sat and stood, and had so many feudal rules that it made people feel numb.