Her parents died unexpectedly, and Xian Ying was taken away when she went to submit her application for suspension of school. She unexpectedly saw a person who looked exactly like herself - the eldest princess Yu Yi.
She was originally the most beloved daughter of her parents, but later her parents were buried in the wilderness. Her eldest brother and second brother were stationed at the border and were not allowed to enter the capital without an imperial edict. After her younger brother Yu Dan ascended the throne, she was ignored by the ministers and became a puppet emperor. Everyone regarded her as a thorn in their side, and it was not easy to be the eldest princess of another time and space.
Forced by the situation, Xian Ying had no choice but to agree to Zhang Yu's disguise as a grown princess in another time and space. In this way, Xian Ying started a life of curing plague and developing water conservancy in different time and space...
But later it was discovered that the organization behind Zhang Yu had other plans for different time and space...
Concept: Fiction, with more ancient parts